var   xmlHttp;
	function   createXMLHttpRequest() {
	if (window.ActiveXObject) {
	xmlHttp = new   ActiveXObject("Microsoft.XMLHTTP");
	}
	else if (window.XMLHttpRequest) {
	xmlHttp = new XMLHttpRequest();
	}
	}
///////////SEMINAR//////////////////
function seminar()
	{
		createXMLHttpRequest();
		var s=document.getElementById("seminar").value;
		document.getElementById("div1").style.background="url(css/images/tab1-hover.jpg)";
		document.getElementById("div2").style.background="url(css/images/tab2.jpg)";
		document.getElementById("div3").style.background="url(css/images/tab3.jpg)";
		var url="ajax/seminar.php?id_cat="+s;
		document.getElementById("response1").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';
		xmlHttp.onreadystatechange = rs_test;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
	}
	
///////////SCHOLARSHIP//////////////////	
	function scholarship()
	{
		createXMLHttpRequest();
		var s=document.getElementById("scholarship").value;
		document.getElementById("div2").style.background="url(css/images/tab2-hover.jpg)";
		document.getElementById("div1").style.background="url(css/images/tab1.jpg)";
		document.getElementById("div3").style.background="url(css/images/tab3.jpg)";
		var url="ajax/scholarship.php?id_cat="+s;
		document.getElementById("response1").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';		
		xmlHttp.onreadystatechange = rs_test;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
		
	}
///////////LUGGAGE FOR STUDY ABROAD//////////////////
	function luggage()
	{
		createXMLHttpRequest();
		var s=document.getElementById("luggage").value;
		document.getElementById("div3").style.background="url(css/images/tab3-hover.jpg)";
		document.getElementById("div1").style.background="url(css/images/tab1.jpg)";
		document.getElementById("div2").style.background="url(css/images/tab2.jpg)";
		var url="ajax/luggage.php?id_cat="+s;
		document.getElementById("response1").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';
		xmlHttp.onreadystatechange = rs_test;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
		}
	function rs_test()
	{
		if(xmlHttp.readyState == 4)
		{
		  if(xmlHttp.status == 200)
			{
				document.getElementById("response1").innerHTML = xmlHttp.responseText;
				
			}
		}		
	}	
///////////CULTURE//////////////////
function culture()
	{
		createXMLHttpRequest();
		var s=document.getElementById("culture").value;
		document.getElementById("div4").style.background="url(css/images/tab1-hover.jpg)";
		document.getElementById("div5").style.background="url(css/images/tab2.jpg)";
		document.getElementById("div6").style.background="url(css/images/tab3.jpg)";
		var url="ajax/culture.php?id_cat="+s;
		document.getElementById("response2").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';
		xmlHttp.onreadystatechange = rs_test2;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
		
	}	
///////////TRAVEL//////////////////
function travel()
	{
		createXMLHttpRequest();
		var s=document.getElementById("travel").value;
		document.getElementById("div5").style.background="url(css/images/tab2-hover.jpg)";
		document.getElementById("div4").style.background="url(css/images/tab1.jpg)";
		document.getElementById("div6").style.background="url(css/images/tab3.jpg)";
		var url="ajax/travel.php?id_cat="+s;
		document.getElementById("response2").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';
		xmlHttp.onreadystatechange = rs_test2;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
		
	}
	
///////////CAREER//////////////////
function career()
	{
		createXMLHttpRequest();
		var s=document.getElementById("career").value;
		document.getElementById("div6").style.background="url(css/images/tab3-hover.jpg)";
		document.getElementById("div4").style.background="url(css/images/tab1.jpg)";
		document.getElementById("div5").style.background="url(css/images/tab2.jpg)";
		var url="ajax/career.php?id_cat="+s;
		document.getElementById("response2").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';
		xmlHttp.onreadystatechange = rs_test2;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
		
	}
	function rs_test2()
	{
		if(xmlHttp.readyState == 4)
		{
		  if(xmlHttp.status == 200)
			{
				document.getElementById("response2").innerHTML = xmlHttp.responseText;
				
			}
		}		
	}
///////////LIFE//////////////////
function life()
	{
		createXMLHttpRequest();
		var s=document.getElementById("life").value;
		document.getElementById("div7").style.background="url(css/images/tab1-hover.jpg)";
		document.getElementById("div8").style.background="url(css/images/tab2.jpg)";
		document.getElementById("div9").style.background="url(css/images/tab3.jpg)";
		var url="ajax/life.php?id_cat="+s;
		document.getElementById("response3").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';
		xmlHttp.onreadystatechange = rs_test3;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
		
	}
	
///////////STUDENT ABROAD//////////////////
function student()
	{
		createXMLHttpRequest();
		var s=document.getElementById("student").value;
		document.getElementById("div8").style.background="url(css/images/tab2-hover.jpg)";
		document.getElementById("div7").style.background="url(css/images/tab1.jpg)";
		document.getElementById("div9").style.background="url(css/images/tab3.jpg)";
		var url="ajax/student.php?id_cat="+s;
		document.getElementById("response3").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';
		xmlHttp.onreadystatechange = rs_test3;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
		
	}
	
///////////LIFE//////////////////
function file()
	{
		createXMLHttpRequest();
		var s=document.getElementById("file").value;
		document.getElementById("div9").style.background="url(css/images/tab3-hover.jpg)";
		document.getElementById("div8").style.background="url(css/images/tab2.jpg)";
		document.getElementById("div7").style.background="url(css/images/tab1.jpg)";
		var url="ajax/file.php?id_cat="+s;
		document.getElementById("response3").innerHTML = '<img src="images/loading.gif" width="32"/> Đang tải...';
		xmlHttp.onreadystatechange = rs_test3;
		xmlHttp.open("POST",url,true);
		xmlHttp.send(null);
		
	}
	function rs_test3()
	{
		if(xmlHttp.readyState == 4)
		{
		  if(xmlHttp.status == 200)
			{
				document.getElementById("response3").innerHTML = xmlHttp.responseText;
				
			}
		}		
	}