var content;
var oldContent;
var head;
var oldHead;
var xmlHttp;
var xmlHttpHead;

function getTabContent(cont)
{
content = cont;
if(content == oldContent)
	return false;
if(document.getElementById('tabContent'))
	document.getElementById('tabContent').innerHTML = '<div style="height:264px;width:360px;text-align:center;margin:0px;padding:0px;"><img style="margin-top:70px;" src="/themes/newarabic/images/loading.gif" width="48" height="48" alt="جاري التحميل..."></div>';

// set image style
setSelectedStyle(content,70);
if(oldContent)	setSelectedStyle(oldContent,100);

xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url='';
switch(content){
	case 'articleRecent':
		url="/arabic/includes/recent_articles.php";
	break;
	
	case 'articleReads':
		url="/arabic/includes/most_reads_articles.php";
	break;
	
	case 'articleComments':
		url="/arabic/includes/most_comments_articles.php";
	break;
	
	case 'videoRecent':
		url="/arabic/includes/recent_videos.php";
	break;
	
	case 'videoEval':
		url="/arabic/includes/most_evel_videos.php";
	break;
	
	case 'videoComments':
		url="/arabic/includes/most_comments_videos.php";
	break;
	
	case 'videoViews':
		url="/arabic/includes/most_views_videos.php";
	break;
}
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function setSelectedStyle(img,value){
	obj = document.getElementById(img);
	obj.style.filter="progid:DXImageTransform.Microsoft.alpha(opacity="+value+")";
	obj.style.opacity=value/100;
	obj.style.MozOpacity=value/100;
	obj.style.KhtmlOpacity=value/100;
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
if(document.getElementById('tabContent')) document.getElementById('tabContent').innerHTML=xmlHttp.responseText;
oldContent = content;
}
}



function getTabHead(hd)
{
head = hd;
if(head == oldHead)
	return false;

// set image style
setSelectedStyle(head,70);
if(oldHead)	setSelectedStyle(oldHead,100);

xmlHttpHead=GetXmlHttpObjectHead();
if (xmlHttpHead==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
headUrl="/arabic/includes/tab_head.php?type="+head;
xmlHttpHead.onreadystatechange=stateChangedHead;
xmlHttpHead.open("GET",headUrl,true);
oldContent = null;
xmlHttpHead.send(null);
}

function stateChangedHead() 
{ 
if (xmlHttpHead.readyState==4)
{
if(document.getElementById('tabHead')) document.getElementById('tabHead').innerHTML=xmlHttpHead.responseText;
oldHead = head;
switch (head){
	case 'hpArticles':
		getTabContent('articleRecent');
	break;
	
	case 'hpVideos':
		getTabContent('videoRecent');
	break;
}
}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}

function GetXmlHttpObjectHead()
{
var xmlHttpHead=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttpHead=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttpHead=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttpHead=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttpHead;
}