var flag=false;

function makeAjaxRequest(url,poststr,type) {
        if(flag==true)
                return;
        flag=true;
        var http_request = false;

        if (window.XMLHttpRequest) {    // Mozilla, Safari,...
                http_request = new XMLHttpRequest();
                if (http_request.overrideMimeType) {
                    http_request.overrideMimeType('text/xml');
                }
        } else if (window.ActiveXObject) { // IE
                try {
                    http_request = new ActiveXObject('Msxml2.XMLHTTP');
                } catch (e) {
                        try {
                          http_request = new ActiveXObject('Microsoft.XMLHTTP');
                        } catch (e) {}
                }
        }

        if (!http_request) {
        alert('Giving up :( Cannot create an XMLHTTP instance');
                return false;
        }


    if(type == 'general')
    {
            if(handleRequest != null)
                    http_request.onreadystatechange = function() { handleRequest(http_request); };
    }
    else if(type == 'sort')
    {
//        if(handleSortRequest != null)
//                    http_request.onreadystatechange = function() { handleSortRequest(http_request); };
    }
    else if(type == 'bookmarks')
    {
        if(handleBookmarkRequest != null)
                    http_request.onreadystatechange = function() { handleBookmarkRequest(http_request); };
    }
    else if(type == 'add_bookmark')
    {
        if(handleAddBookmarkRequest != null)
                    http_request.onreadystatechange = function() { handleAddBookmarkRequest(http_request); };
    }
    else if(type == 'delete_bookmark')
    {
        if(handleBookmarkRequest != null)
                    http_request.onreadystatechange = function() { handleBookmarkRequest(http_request); };
    }
    else if(type == 'chat')
    {
        if(handleChatRequest != null)
                    http_request.onreadystatechange = function() { handleChatRequest(http_request); };
    }
    else if(type == 'login')
    {
        if(document.getElementById('message_div')) {
            document.getElementById('message_div').innerHTML='';
        }

        if(document.getElementById('messageP') && document.getElementById('waitMessage')) {
            document.getElementById('messageP').innerHTML="<b>"+document.getElementById('waitMessage').innerHTML+"</b>";
        }

        if(handleLoginRequest != null)
                http_request.onreadystatechange = function() { handleLoginRequest(http_request); };
    }
    else if(type == 'suggestions')
    {
        //alert('setting function');
        if(handleSuggestionsRequest != null)
                    http_request.onreadystatechange = function() { handleSuggestionsRequest(http_request); };
    }
    else if(type == 'set_positions')
    {
        if(handleSetPositions != null)
                    http_request.onreadystatechange = function() { handleSetPositions(http_request); };

    }
    else if(type == 'setSeenContent') {
        if(handleSetSeenContentRequest != null)
                    http_request.onreadystatechange = function() { handleSetSeenContentRequest(http_request); };
    }
    else if(type == 'setCurrentUnit') {
        if(handleSetSeenContentRequest != null)
                    http_request.onreadystatechange = function() { handleSetSeenContentRequest(http_request); };
    }

    if(poststr=='special_get_request')
    {
            http_request.open( 'POST', url, true);
            //http_request.setRequestHeader('Content-Type', 'charset=iso-8859-7');
            http_request.send(null);
    }
    else
    {
            http_request.open( 'POST', url, true);
            http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
            http_request.setRequestHeader('Content-length', poststr.length);
            http_request.setRequestHeader('Connection', 'close');
            http_request.send(poststr);
    }
    flag=false;
}
//var IE = false;
//if (navigator.appName == "Microsoft Internet Explorer"){IE = true}
//if (!IE){document.captureEvents(Event.MOUSEMOVE)}

function mouseX(evt)
{
    if (evt.pageX)
        return evt.pageX;
    else if (evt.clientX)
        return evt.clientX +
        (document.documentElement.scrollLeft ?  document.documentElement.scrollLeft : document.body.scrollLeft);
    else return null;
}

function mouseY(evt)
{
    if (evt.pageY)
        return evt.pageY;
    else if (evt.clientY)
        return evt.clientY +
        (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);
    else return null;
}

var prev_response=0;


function handleRequest(http_request) {
        if (http_request.readyState == 4) {
                if (http_request.status == 200) {
                        var xmldoc = http_request.responseXML;
                        var messages_num_node = xmldoc.getElementsByTagName('number').item(0);
//alert(messages_num_node);

                        var messages_num = messages_num_node.firstChild.data;
//alert(messages_num);
                        var message_node = xmldoc.getElementsByTagName('text').item(0);
                        var message = message_node.firstChild.data;
                        var users_online_node = xmldoc.getElementsByTagName('users').item(0);
                        var users_online = users_online_node.firstChild.data;
                        var users_num_node = xmldoc.getElementsByTagName('users_num').item(0);
                        var users_num = users_num_node.firstChild.data;
            if(users_num == '0') {
                top.location = '/index.php?logout=true&reason=timeout';
                return;
            }
                        //alert(users_online);
            //alert(http_request.responseText);
                        //http_request.responseText.split('-|*special_splitter*|-');
                        //changePrivateMessagesText(response[0],response[1]);
                        //alert("num "+messages_num+"\ntext: "+message);
                        changeMessagesText(messages_num,message,users_online);
                }
        }
}



function handleBookmarkRequest(http_request) {
        if (http_request.readyState == 4) {
            if (http_request.status == 200) {
                        var xmldoc = http_request.responseXML;
                        var bookmarks_num_node = xmldoc.getElementsByTagName('num_bookmarks').item(0);
                        var bookmarks_num = bookmarks_num_node.firstChild.data;

                top.mainframe.document.getElementById('empty_bookmarks_box').style.display = 'none';
                bookmark_str = '<table style = "width:100%;vertical-align:top">';
                var ie_str;
                var detect = navigator.userAgent.toLowerCase();
                detect.indexOf("msie") > 0 ? ie_str = "&ie=1" :ie_str = "";

                for (i = 0; i < bookmarks_num; i++)
                {
                    var bookmark_node = xmldoc.getElementsByTagName('bookmark').item(i);//alert(bookmark_node.childNodes[0].firstChild);alert(bookmark_node.childNodes[1].firstChild);alert(bookmark_node.childNodes[2].firstChild);
                    var bookmark_name = bookmark_node.childNodes[0].firstChild.data;
                    var bookmark_url  = bookmark_node.childNodes[1].firstChild.data;
                    var bookmark_id   = bookmark_node.childNodes[2].firstChild.data;
                    //bookmark_str += "<tr><td>"+ bookmark_name + "</td><td style='padding-left:10px;'>" + bookmark_url + "</td></tr>";
                    bookmark_str += "<tr><td><a href = '"+bookmark_url+"'>"+bookmark_name+"</a></td>";
                    bookmark_str += "<td align = 'right'><a href='javascript:void(0)' ";
                    bookmark_str += "onclick = \"makeAjaxRequest('/delete_bookmark.php?id="+bookmark_id+ie_str+"','special_get_request','delete_bookmark')\">";
                    bookmark_str += "<img src='/images/16x16/delete."+globalImageExtension+"' border = '0'/></a></td></tr>";
                }
                bookmark_str += "</table>";
                //alert(bookmark_str);
                if(top.mainframe.document.getElementById('bookmarks_box'))
                    top.mainframe.document.getElementById('bookmarks_box').innerHTML = bookmark_str;

                if(top.mainframe.document.getElementById('bookmarks_table'))
                {
                    top.mainframe.document.getElementById('bookmarks_table').style.display = '';
                }
                if (bookmarks_num == 0) {
                    top.mainframe.document.getElementById('empty_bookmarks_box').style.display = '';
                }
            }
        }
}


function handleAddBookmarkRequest(http_request) {
        if (http_request.readyState == 4) {
                if (http_request.status == 200) {

                }
        }
}

function handleSetSeenContentRequest(http_request) {
        if (http_request.readyState == 4) {
                if (http_request.status == 200) {

                }
        }
}

function handleDeleteBookmarkRequest(http_request) {
        if (http_request.readyState == 4) {
                if (http_request.status == 200) {
                    if(http_request.responseText == "ok") {
                        hide_bookmarks_box();
                    }
                }
        }
}


function handleChatRequest(http_request) {

        try {
        if (http_request.readyState == 4) {
                if (http_request.status == 200) {
            //alert(http_request.responseText);
            //return;
                        var response = http_request.responseText.split("special_splitter");
                        test.document.getElementById("chat_content").innerHTML=response[0]+"\n"+test.document.getElementById("chat_content").innerHTML;
                    //alert("resp = " + response[0] +"\nchat = "+test.document.getElementById("chat_content").innerHTML);
                        document.getElementById("users_list").innerHTML=response[1];
                        document.getElementById("rooms_list").innerHTML=response[2];//"sent="+sent_messages+"+"+response[3];
//                      if(response[3]!="0" && response[3]!="undefined")
//                      {
                                //sent_messages=sent_messages+parseInt(response[3]);
                        //      if(response[3]>last_id)
//                                      last_id=response[3];
                                //document.getElementById("rooms_list").innerHTML="Going to "+sent_messages+" sent messages";
//                              document.getElementById("rooms_list").innerHTML="New last id: "+last_id;
//                      }
//                      else
//                              document.getElementById("rooms_list").innerHTML="Last id: "+last_id;
            } else {
                    //alert("There was a problem with the request.");
            }
        }
    }
    catch(e) {}
}

function handleLoginRequest(http_request) {

    try {
        if (http_request.readyState == 4) {
            if (http_request.status == 200) {
        //alert(http_request.responseText);
    //var is_ie;
        //var detect = navigator.userAgent.toLowerCase();
        //detect.indexOf("msie") > 0 ? is_ie = "true" : is_ie = "false";

    if(document.getElementById('messageP')) {
            document.getElementById('messageP').innerHTML="&nbsp;";
    }

            var xmldoc = http_request.responseXML;
            var type_node = xmldoc.getElementsByTagName('type').item(0);
            var type = type_node.firstChild.data;
            var success_node = xmldoc.getElementsByTagName('success').item(0);
            var success = success_node.firstChild.data;
            var message_node = xmldoc.getElementsByTagName('message').item(0);
            var message = message_node.firstChild.data;
            if(success == 'false')
            {
                var msgdiv = document.getElementById('message_div');
                if(msgdiv)
                    msgdiv.innerHTML = message;
            }
            else
            {
                //document.login_form.action = document.login_form.hidden_action.value;
                //alert(document.login_form.action);
                //document.login_form.onSubmit = function() {return true;};
                document.login_form.hidden_value.value = 'true';
                document.login_form.submit_login.click();
            }

                        //var response = http_request.responseText.split("special_splitter");
                        //test.document.getElementById("chat_content").innerHTML=response[0]+"\n"+test.document.getElementById("chat_content").innerHTML;
            //alert("resp = " + response[0] +"\nchat = "+test.document.getElementById("chat_content").innerHTML);
                        //document.getElementById("users_list").innerHTML=response[1];
                        //document.getElementById("rooms_list").innerHTML=response[2];//"sent="+sent_messages+"+"+response[3];
        } else {
                //alert("There was a problem with the request.");
            }
        }
    }
    catch(e) {}
}

function handleSuggestionsRequest(http_request) {
    try {
           if (http_request.readyState == 4) {
                if (http_request.status == 200) {
            //alert(http_request.responseText);
                  //var xmldoc = http_request.responseXML;
                  //var bookmarks_num_node = xmldoc.getElementsByTagName('num_bookmarks').item(0);
                  //var bookmarks_num = bookmarks_num_node.firstChild.data;

                //var ie_str;
                //var detect = navigator.userAgent.toLowerCase();
                //detect.indexOf("msie") > 0 ? ie_str = "&ie=1" :ie_str = "";

                }
           }
    }
    catch(e) {}
}

function handleSetPositions(http_request) {
    try {
           if (http_request.readyState == 4) {
                if (http_request.status == 200) {
                //alert("OK");
                //alert(http_request.responseText);
                  //var xmldoc = http_request.responseXML;
                  //var bookmarks_num_node = xmldoc.getElementsByTagName('num_bookmarks').item(0);
                  //var bookmarks_num = bookmarks_num_node.firstChild.data;

                //var ie_str;
                //var detect = navigator.userAgent.toLowerCase();
                //detect.indexOf("msie") > 0 ? ie_str = "&ie=1" :ie_str = "";

                }
           }
    }
    catch(e) {}
}

function call_bookmarks()
{
    var ie_str;
    var detect = navigator.userAgent.toLowerCase();
    detect.indexOf("msie") > 0 ? ie_str = "?ie=1" :ie_str = "";

    makeAjaxRequest('/ask_bookmarks.php'+ie_str,'special_get_request','bookmarks');
}

function sendMessage(chat_message,chatrooms_ID)
{
        //alert("sending message");
        chat_message.replace("&","&amp;");
        makeAjaxRequest("/ask_chat.php?chatrooms_ID="+chatrooms_ID,"chat_message="+encodeURIComponent(chat_message), "chat" );
        document.chat_form.chat_message.value="";
}

function enableButton()
{
        if(document.chat_form.chat_message.value!="")
        {
            document.chat_form.submit.disabled=false;
        }
        else
        {
            document.chat_form.submit.disabled=true;
        }
}

function setFocus()
{
        try {
            document.chat_form.chat_message.focus();
        } catch(e) { }
}

function changeMessagesText(responseInt,responseText,users_online)
{
        if(responseInt!==prev_response)
        {
                if(document.getElementById('new_private_message'))
                {
                        document.getElementById('new_private_message').innerHTML=responseText;
                }
                if(document.getElementById('recent_unread'))
                {
                        document.getElementById('recent_unread').innerHTML=responseInt;
                }
                if(document.getElementById('recent_unread_left'))
                {

                        if (responseInt == 0)
                        {
                            document.getElementById('unread_img').innerHTML="";
                            document.getElementById('recent_unread_left').innerHTML="";
                        }
                        else
                        {
                            document.getElementById('unread_img').innerHTML="<img src = \"/images/16x16/mail2."+globalImageExtension+"\" />";
                            document.getElementById('recent_unread_left').innerHTML="(<a href = \"/forum/messages_index.php\" target=\"mainframe\">"+responseInt+"</a>)";
                        }

                }
        }
        prev_response=responseInt;
        if(document.getElementById('users_online'))
        {
                document.getElementById('users_online').innerHTML=users_online;
        }
    //alert(users_online);
}

var cur_user="";
var glob_mousex;
var glob_mousey;

function show_user_box(user_str,user,send_msg,view_page,user_type,user_time)
{
    //if (user != cur_user && user != '') {
        href_str = '<a href = "/forum/new_message.php?recipient='+user+'" onclick = "eF_js_showDivPopup(\'\', \'\', \'user_table\');eF_js_showDivPopup(\'\', new Array(\'650px\', \'450px\'))" target = "POPUP_FRAME">'+send_msg+"</a>";

        if (top.mainframe.document.getElementById('popup_title')) {
            top.mainframe.document.getElementById('popup_title').innerHTML = user_str;
        }

        if (top.mainframe.document.getElementById('user_box')) {
            top.mainframe.document.getElementById('user_box').innerHTML=user_time+"<hr class='bluethin'/>"+href_str;
        }

        //cur_user = user;
    //} else {
        cur_user = "";
    //}
}

//function hide_user_box()
//{
//    if(top.mainframe.document.getElementById('user_table'))
//        top.mainframe.document.getElementById('user_table').style.display='none';
//
//    cur_user = "";
//}

function addBookmark(addstr)
{
    var url = top.mainframe.location.pathname+top.mainframe.location.search;
    var name = top.mainframe.document.getElementById('title').innerHTML;
    //url.substring(1);
    url.replace("&","&amp;");
//  do {
//  var pos = name.indexOf("\">");
//  var pos2 = name.indexOf("</A>");
//  name = name.substring(pos+2,pos2)+name.substring(pos2+4);
//  alert(name);
//  } while ( (pos = name.indexOf("\">"))>=0)
    name = name.replace(/<[^>]*>/g,'');
    name = name.replace(/&nbsp;/g,'');
    //name = name.substring(0,name.length-1);
    //alert(name);
    //name.replace("&","&amp;");
    url_encoded = encodeURIComponent(url);
    name_encoded = encodeURIComponent(name);
    if(confirm(addstr))
    {
    makeAjaxRequest('/add_bookmark.php','url='+url_encoded+'&name='+name_encoded,'add_bookmark');
    }

}

function setXY(e)
{
    var posx = 0;
    var posy = 0;
    if (!e) var e = window.event;

    //if(!e) alert('eee!');
    //var e = window.event;
    if( e.pageX || e.pageY ){
        posx = e.pageX;
        posy = e.pageY;
    }
    else if(e.clientX || e.clientY) {
        posx = e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
        posy = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
    }
    // posx and posy contain the mouse position relative to the document
    // Do something with this information
    //document.getElementById('user_table').style.left = posX;
    //document.getElementById('user_table').style.top = posX - 10;
    //alert(posx+" "+posy);
    glob_mousex = posx;
    glob_mousey = posy;
}

function simple(e)
{
    if(!e)
        var e = window.event;

    if( e.pageX || e.pageY ){
        posx = e.pageX;
        posy = e.pageY;
    }
    else if(e.clientX || e.clientY) {
        posx = e.clientX + document.body.scrollLeft
            + document.documentElement.scrollLeft;
        posy = e.clientY + document.body.scrollTop
            + document.documentElement.scrollTop;
    }
    //alert(posx+","+posy);

}

function hideObj(obj)
{
        if(obj)
        {
                alert(obj.innerHTML);
                obj.style.display = 'none';
        }
        else
                alert('obj not found');
}

function showObj(obj)
{
        if(obj)
        {
                obj.style.display = '';
        }
}

function toggleVisibility(obj,img)
{
        if(!obj)
                return;

        if(obj.style.display=='')
        {
                obj.style.display = 'none';
        createCookie(obj.id,'hidden',30);
                if(img)
                {
                        img.className='plus';
                        //changeImage(img);
                }
        }
        else
        {
                obj.style.display = '';
        createCookie(obj.id,'visible',30);
                if(img)
                {
                        img.className='minus';
                        //changeImage(img);
                }
        }
}

var currentShownPopup = null;

function togglePopup(obj)
{
        if(!obj)
                return;

      img_obj = obj.childNodes[1];
      span_obj = obj.childNodes[2];
      //img_inner_obj = span_obj.childNodes[0];

        if(img_obj.style.display!='block')
        {
          img_obj.style.display='block';
          span_obj.style.display='block';
          //img_inner_obj.style.display='block';
          if(currentShownPopup!=null)
            hidePopup(currentShownPopup);
          currentShownPopup = obj;
        }
        else
        {
          img_obj.style.display='none';
          span_obj.style.display='none';
          //img_inner_obj.style.display='none';
          currentShownPopup = null;
        }

      obj.blur();
      return;
}

var sidebar_width = 18;
function initSidebar(s_login)
{
    var is_ie;
        var detect = navigator.userAgent.toLowerCase();
        detect.indexOf("msie") > 0 ? is_ie = "true" : is_ie = "false";

    var value = readCookie(s_login+'_sidebar');
    if(value == 'hidden')
    {
        top.document.getElementById('framesetId').cols = ""+sidebar_width+", *";
        top.sideframe.document.body.style.paddingLeft = "20px";
        top.sideframe.document.getElementById('arrow_down').style.right = "300px";
        top.sideframe.document.getElementById('arrow_up').style.right = "300px";

        if(top.sideframe.document.getElementById('toggleSidebarImage').src)
            top.sideframe.document.getElementById('toggleSidebarImage').src = '/images/16x16/navigate_right.'+globalImageExtension;

        if(is_ie == "true")
        {
            top.sideframe.document.getElementById('toggleSidebarImage').style.position="absolute";
            top.sideframe.document.getElementById('toggleSidebarImage').style.left = "0px";
            top.sideframe.document.getElementById('toggleSidebarImage').style.top = "4px";
        }
        top.sideframe.document.getElementById('logoutImage').style.position="absolute";
        top.sideframe.document.getElementById('logoutImage').style.left = "1px";
        top.sideframe.document.getElementById('logoutImage').style.top = "45px";
        top.sideframe.document.getElementById('mainPageImage').style.position="absolute";
        top.sideframe.document.getElementById('mainPageImage').style.left = "1px";
        top.sideframe.document.getElementById('mainPageImage').style.top = "25px";

        //changeImage(top.sideframe.document.getElementById('toggleSidebarImage'));
        //changeImage(top.sideframe.document.getElementById('logoutImage'));
        //changeImage(top.sideframe.document.getElementById('mainPageImage'));
    }
    else
    {
        top.document.getElementById('framesetId').cols = "150, *";
        top.sideframe.document.body.style.paddingLeft = "0px";
        top.sideframe.document.getElementById('arrow_down').style.right = "1px";
        top.sideframe.document.getElementById('arrow_up').style.right = "1px";

        if(top.sideframe.document.getElementById('toggleSidebarImage').src)
            top.sideframe.document.getElementById('toggleSidebarImage').src = '/images/16x16/navigate_left.'+globalImageExtension;


        if(is_ie == "true")
        {
            top.sideframe.document.getElementById('toggleSidebarImage').style.position="absolute";
            top.sideframe.document.getElementById('toggleSidebarImage').style.left = "134px";
            top.sideframe.document.getElementById('toggleSidebarImage').style.top = "4px";

        }
        top.sideframe.document.getElementById('logoutImage').style.position="absolute";
        top.sideframe.document.getElementById('logoutImage').style.left = "1000px";
        top.sideframe.document.getElementById('logoutImage').style.top = "45px";
        top.sideframe.document.getElementById('mainPageImage').style.position="absolute";
        top.sideframe.document.getElementById('mainPageImage').style.left = "1000px";
        top.sideframe.document.getElementById('mainPageImage').style.top = "25px";

        //changeImage(top.sideframe.document.getElementById('toggleSidebarImage'));
        //changeImage(top.sideframe.document.getElementById('logoutImage'));
        //changeImage(top.sideframe.document.getElementById('mainPageImage'));
    }

}

function toggleSidebar(s_login)
{

    var is_ie;
        var detect = navigator.userAgent.toLowerCase();
        detect.indexOf("msie") > 0 ? is_ie = "true" : is_ie = "false";
    //var value = readCookie('sidebar');
    var value = readCookie(s_login+'_sidebar');
    
    if(value == 'hidden')
    {
        createCookie(s_login+'_sidebar','visible',30);
        top.document.getElementById('framesetId').cols = "150, *";
        top.sideframe.document.body.style.paddingLeft = "0px";
        top.sideframe.document.getElementById('arrow_down').style.right = "1px";
        top.sideframe.document.getElementById('arrow_up').style.right = "1px";
        setArrowStatus('down');
        initArrows();
        top.sideframe.document.getElementById('toggleSidebarImage').src = '/images/16x16/navigate_left.'+globalImageExtension;
        if(is_ie == "true")
        {
            top.sideframe.document.getElementById('toggleSidebarImage').style.position="absolute";
            top.sideframe.document.getElementById('toggleSidebarImage').style.left = "134px";
            top.sideframe.document.getElementById('toggleSidebarImage').style.top = "4px";
        }
        top.sideframe.document.getElementById('logoutImage').style.position="absolute";
        top.sideframe.document.getElementById('logoutImage').style.left = "1000px";
        top.sideframe.document.getElementById('logoutImage').style.top = "45px";
        top.sideframe.document.getElementById('mainPageImage').style.position="absolute";
        top.sideframe.document.getElementById('mainPageImage').style.left = "1000px";
        top.sideframe.document.getElementById('mainPageImage').style.top = "25px";

        //top.sideframe.document.getElementById('toggleSidebarImage').style= "position: absolute; left: 0px";
        //changeImage(top.sideframe.document.getElementById('toggleSidebarImage'));
        //changeImage(top.sideframe.document.getElementById('logoutImage'));
        //changeImage(top.sideframe.document.getElementById('mainPageImage'))
    }
    else
    {

        createCookie(s_login+'_sidebar','hidden',30);
        top.document.getElementById('framesetId').cols = ""+sidebar_width+", *";
        top.sideframe.document.body.style.paddingLeft = "130px";
        top.sideframe.document.getElementById('arrow_down').style.right = "300px";
        top.sideframe.document.getElementById('arrow_up').style.right = "300px";
        top.sideframe.document.getElementById('toggleSidebarImage').src = '/images/16x16/navigate_right.'+globalImageExtension;

        if(is_ie == "true")
        {
            top.sideframe.document.getElementById('toggleSidebarImage').style.position="absolute";
            top.sideframe.document.getElementById('toggleSidebarImage').style.left = "0px";
            top.sideframe.document.getElementById('toggleSidebarImage').style.top = "4px";

        }
        top.sideframe.document.getElementById('logoutImage').style.position="absolute";
        top.sideframe.document.getElementById('logoutImage').style.left = "1px";
        top.sideframe.document.getElementById('logoutImage').style.top = "45px";
        top.sideframe.document.getElementById('mainPageImage').style.position="absolute";
        top.sideframe.document.getElementById('mainPageImage').style.left = "1px";
        top.sideframe.document.getElementById('mainPageImage').style.top = "25px";

        //top.sideframe.document.getElementById('toggleSidebarImage').style.position = "absolute";position: absolute; left: 0px";
        //changeImage(top.sideframe.document.getElementById('toggleSidebarImage'));
        //changeImage(top.sideframe.document.getElementById('logoutImage'));
        //changeImage(top.sideframe.document.getElementById('mainPageImage'));
    }
}




var obj_toHide = null;

function delayedHidePopup(obj) {
    obj_toHide = obj;
    //setTimeout(hideObjectPopup,2000);
}

function hideObjectPopup() {
    if(obj_toHide) {
        hidePopup(obj_toHide)
    }
}
function hidePopup(obj)
{
        if(!obj)
                return;

      img_obj = obj.childNodes[1];
      span_obj = obj.childNodes[2];
      //img_inner_obj = span_obj.childNodes[1];

      img_obj.style.display='none';
      span_obj.style.display='none';
      //img_inner_obj.style.display='none';

      currentShownPopup = null;
      obj.blur();
      return;
}


function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

//function gotoEditPage(content_ID) {
    //location = 'professor.php?ctg=lessons&content_ID='+content_ID+'&submit_update_content';
    //document.forms['insertUpdateForm'].action = 'professor.php?ctg=lessons&content_ID='+content_ID;
    //document.forms['insertUpdateForm'].submit_update_content.click();
//    location = 'professor.php?ctg=content&edit_unit='+content_ID+'';
//}

// http://www.dreamincode.net/code/snippet293.htm 20/6/2007
function getElementsByName_iefix(tag, name) {

     var elem = document.getElementsByTagName(tag);
     var arr = new Array();
     for(i = 0,iarr = 0; i < elem.length; i++) {
          att = elem[i].getAttribute("name");
          if(att == name) {
               arr[iarr] = elem[i];
               iarr++;
          }
     }
     return arr;
}



var directions_status = "expanded";
function toggleDirections(imageObj) {
   /* elements1 = getElementsByName_iefix('tr','default_visible');   //changed in 20/6/2007 by makriria because of http://www.dreamincode.net/code/snippet293.htm   getElementsByName has problems in IE
    elements2 = document.getElementsByName('default_hidden');
    elements3 = document.getElementsByName('default_visible_image');
    elements4 = document.getElementsByName('default_hidden_image');*/
    elements1 = getElementsByName_iefix('tr','default_visible');
    elements2 = getElementsByName_iefix('tr','default_hidden');
    elements3 = getElementsByName_iefix('img','default_visible_image');
    elements4 = getElementsByName_iefix('img','default_hidden_image');
    if(directions_status == "expanded") {
        for(i=0;i<elements1.length;i++) {
            elements1[i].style.display = 'none';
        }
        for(i=0;i<elements2.length;i++) {
            elements2[i].style.display = 'none';
        }
        for(i=0;i<elements3.length;i++) {
            elements3[i].src = '/images/others/plus.png';
        }
        for(i=0;i<elements4.length;i++) {
            elements4[i].src = '/images/others/plus.png';
        }
        imageObj.src = '/images/others/plus.png';
        directions_status = "collapsed";
    } else {
        for(i=0;i<elements1.length;i++) {
            elements1[i].style.display = '';
        }
        for(i=0;i<elements2.length;i++) {
            elements2[i].style.display = '';
        }
        for(i=0;i<elements3.length;i++) {
            elements3[i].src = '/images/others/minus.png';
        }
        for(i=0;i<elements4.length;i++) {
            elements4[i].src = '/images/others/minus.png';
        }
        imageObj.src = '/images/others/minus.png';
        directions_status = "expanded";
    }
}

function revertDirections(visible_name,hidden_name,visible_image_name,hidden_image_name) {
    var visibles = document.getElementsByName(visible_name);
    var hiddens = document.getElementsByName(hidden_name);
    var visibleImages = document.getElementsByName(visible_image_name);
    var hiddenImages = document.getElementsByName(hidden_image_name);

    for(i=0;i<visibles.length;i++) {
        visibles[i].style.display = '';
    }
    for(i=0;i<hiddens.length;i++) {
        hiddens[i].style.display = 'none';
    }
    for(i=0;i<visibleImages.length;i++) {
        visibleImages[i].src = '/images/others/minus.png';
    }
    for(i=0;i<hiddenImages.length;i++) {
        hiddenImages[i].src = '/images/others/plus.png';
    }
}

function getScrollXY() {
  var scrOfX = 0, scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
    scrOfX = window.pageXOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
    scrOfX = document.body.scrollLeft;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
    scrOfX = document.documentElement.scrollLeft;
  }
  return [ scrOfX, scrOfY ];
}

function getWindowSize() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }

  return [myWidth, myHeight];
  //window.alert( 'Width = ' + myWidth );
  //window.alert( 'Height = ' + myHeight );
}

//document.onmousemove = setXY