var xmlHttp
function showCustomer(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("HIGHTECH").innerHTML='<br><br><br><br><br><br><br><br><br><br><br><br><br><center>HIGHTECH VIỆT NAM<br><br><img src="js/loading.gif" boder=0 width="16" height="16"><br><br>Đang tải dữ liệu ...</center><br> <br><br><br><br><br><br><br><br><br><br><br><br>  ';

} 

  else  if (xmlHttp.readyState==4 || xmlHttp.readyState=="200")
{ 
document.getElementById("HIGHTECH").innerHTML=xmlHttp.responseText 
window.status="Đã tải xong dữ liệu !";
}  
}
<!----------PLAY MUsic------------------------------------------------------------------->
function showCustomer2(file)
{ 
var url=""+file+"";
xmlHttp=GetXmlHttpObject(stateChanged2)
xmlHttp.open("GET", url , true)
xmlHttp.send(null)
} 

function stateChanged2() 
{ 
if (xmlHttp.readyState==1 || xmlHttp.readyState==2)
{ 
document.getElementById("PLAY").innerHTML='<br><center>WWW.DAVINA.COM.VN<br><br><img src="js/loading.gif" boder=0 width="16" height="16"><br><br>Đang tải dữ liệu ...</center><br><br><br>';
} 

  else  if (xmlHttp.readyState==4 || xmlHttp.readyState=="200")
{ 
document.getElementById("PLAY").innerHTML=xmlHttp.responseText 
window.status="Đã tải xong dữ liệu !";
}  
}
<!----------CHECK DOMAIN------------------------------------------------------------------->
function showCustomer3(file)
{ 
var url=""+file+"";
xmlHttp=GetXmlHttpObject(stateChanged3)
xmlHttp.open("GET", url , true)
xmlHttp.send(null)
} 

function stateChanged3() 
{ 
if (xmlHttp.readyState==1 || xmlHttp.readyState==2)
{ 
document.getElementById("HIGHTECHVNCHECK").innerHTML='<br><br><center>HIGHTECH VIỆT NAM<br><br><img src="js/loading.gif" boder=0 width="16" height="16"><br><br>Đang tải dữ liệu ...</center><br><br>  ';
} 

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

function showCustomer4(file)
{ 
var url=""+file+"";
xmlHttp=GetXmlHttpObject(stateChanged4)
xmlHttp.open("GET", url , true)
xmlHttp.send(null)
} 

function stateChanged4() 
{ 
if (xmlHttp.readyState==1 || xmlHttp.readyState==2)
{ 
document.getElementById("QUANGCAO").innerHTML='<br><center>HIGHTECH VIỆT NAM<br><br><img src="js/loading.gif" boder=0 width="16" height="16"><br><br>Đang tải dữ liệu ...</center><br>';
} 

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


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
}
}