var xmlHttp;

function fshow(str,url)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
url=url+"?q="+str;
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}



// Lan sau minh khong can viet nhieu ham the nay.Chua quen Ajax lam nen danh de tam the nay vay!
function goto(str1,str2,url)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
url=url+"?page="+str1+"&q="+str2;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged ;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function remove(str1,str2,url)
{
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	 {
	 alert ("Browser does not support HTTP Request");
	 return;
	 }
	url=url+"?type="+str1+ "&act=del" + "&id=" + str2;
	url=url+"&sid="+Math.random();
	//xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);	
}

function setses(str1,str2)
{
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	 {
	 alert ("Browser does not support HTTP Request");
	 return;
	 }
	var url="session.php";
	url=url+"?type="+str1+"&id="+str2;
	url=url+"&sid="+Math.random();
	//xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtHint").innerHTML=xmlHttp.responseText ;
 //doan duoi dung de xoa tat ca noi dung trong the<div id="txtfirst">noi dung trong day se bi xoa </div>
 var x=document.getElementById("txtfirst");
 x.parentNode.removeChild(x);

 } 
}

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;
}