var xmlHttp
<!----------NTContent------------------------------------------------------------------->
function showContent(file)
{ 
var url=""+file+"";
xmlHttp=GetXmlHttpObject(stateChanged)
xmlHttp.open("GET", url , true)
xmlHttp.send(null)
} 

function stateChanged() 
{ 
if (xmlHttp.readyState==1 || xmlHttp.readyState==2)
{ 
document.getElementById("NTContent").innerHTML='<center><div style=width: 360><center>[Xin vui lòng chờ trong giây lát.]<br><br><img src=images/loading.gif boder=0 width="32" height="32"><br><br>Đang tải dữ liệu ...</center>';

} 

  else  if (xmlHttp.readyState==4 || xmlHttp.readyState=="200")
{ 
document.getElementById("NTContent").innerHTML=xmlHttp.responseText 
window.status="Đã tải xong dữ liệu !";
}  
}
<!----------NTContent------------------------------------------------------------------->
var xmlHttp2
<!----------NTContent2------------------------------------------------------------------->
var tagert
function showContent2(file,tagertF)
{ 
tagert = tagertF;
var url=""+file+"";
xmlHttp2=GetXmlHttpObject(stateChanged2)
xmlHttp2.open("GET", url , true)
xmlHttp2.send(null)
return true
} 

function stateChanged2() 
{ 
if (xmlHttp2.readyState==1 || xmlHttp2.readyState==2)
{ 
document.getElementById(tagert).innerHTML='<center><div style=width: 360><center>[Xin vui lòng chờ trong giây lát.]<br><br><img src=images/loading.gif boder=0 width="32" height="32"><br><br>Đang tải dữ liệu ...</center>';

} 

  else  if (xmlHttp2.readyState==4 || xmlHttp2.readyState=="200")
{ 
document.getElementById(tagert).innerHTML=xmlHttp2.responseText 
window.status="Đã tải xong dữ liệu !";
}  
}
<!----------NTContent------------------------------------------------------------------->


<!----------VD2J-CALENDAR------------------------------------------------------------------->
function showCustomerCALENDAR(file)
{ 
var url=""+file+"";
xmlHttp=GetXmlHttpObject(stateChangedCALENDAR)
xmlHttp.open("GET", url , true)
xmlHttp.send(null)
} 

function stateChangedCALENDAR() 
{ 
if (xmlHttp.readyState==1 || xmlHttp.readyState==2)
{ 
document.getElementById("VD2JCALENDAR").innerHTML='<center><br><br>VD2J Music Online <br><br><img src=../images/skin_VD2J/loading.gif boder=0 width="32" height="32"><br><br>Đang tìm kiếm ...</center>';

} 

  else  if (xmlHttp.readyState==4 || xmlHttp.readyState=="200")
{ 
document.getElementById("VD2JCALENDAR").innerHTML=xmlHttp.responseText 
window.status="Đã tải xong dữ liệu !";
}  
}

<!----------VD2J-CALENDAR------------------------------------------------------------------->

<!------------------------Show hide--------------------------------------------------------->
function crossObj(id){
	if (document.getElementById) {
		return document.getElementById(id);
	} else if (document.all) {
		return document.all[id];
	} else if (document.layers) {
		return document.layers[id];
	} else {
		return null;
	}
}

function getO(id) {
	return crossObj(id);
}

function hideO(id) {
	getO(id).style.display = 'none';
}

function showO(id) {
	getO(id).style.display = '';
}

<!------------------------Show hide--------------------------------------------------------->

function GetXmlHttpObject(handler)
{ 
var objXmlHttp=null

if (navigator.userAgent.indexOf("Opera")>=0)
{
alert("This example doesn't work in Opera") 
return 
}
if (navigator.userAgent.indexOf("MSIE")>=0)
{ 
var strName="Msxml2.XMLHTTP"
if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
{
strName="Microsoft.XMLHTTP"
} 
try
{ 
objXmlHttp=new ActiveXObject(strName)
objXmlHttp.onreadystatechange=handler 
return objXmlHttp
} 
catch(e)
{ 
alert("Error. Scripting for ActiveX might be disabled") 
return 
} 
} 
if (navigator.userAgent.indexOf("Mozilla")>=0)
{
objXmlHttp=new XMLHttpRequest()
objXmlHttp.onload=handler
objXmlHttp.onerror=handler 
return objXmlHttp
}
}