function GetXmlHttpObject(handler)  
{  
   var objXMLHttp=null  
   if (window.XMLHttpRequest)  
   {  
       objXMLHttp=new XMLHttpRequest()  
   }  
   else if (window.ActiveXObject)  
   {  
       objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")  
   }  
   return objXMLHttp  
}  
   
function stateChanged()  
{  
  if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")  
  {  
       // txtResult will be filled with new page  
       document.getElementById("txtResult").innerHTML = xmlHttp.responseText  
  }  
  else {  
           //alert(xmlHttp.status);  
   }  
 }  
   
 function htmlData(url, qStr)  
 {   
   if (url.length==0)  
   {  
       document.getElementById("txtResult").innerHTML = "";  
       return;  
   }  
   
   xmlHttp = GetXmlHttpObject();  
   
   if (xmlHttp==null)  
   {  
       alert ("Browser does not support HTTP Request");  
       return;  
   }  
   
   url=url+"?"+qStr;  
   url=url+"&sid="+Math.random();  
   xmlHttp.onreadystatechange = stateChanged;  
   xmlHttp.open("GET",url,true) ;  
   xmlHttp.send(null);  
 } 
 
 function imagepreviw(url, qStr)  
 {   
   if (url.length==0)  
   {  
       document.getElementById("imagepreview").innerHTML = "";  
       return;  
   }  
   
   xmlHttp = GetXmlHttpObject();  
   
   if (xmlHttp==null)  
   {  
       alert ("Browser does not support HTTP Request");  
       return;  
   }  
   
   url=url+"?"+qStr;  
   url=url+"&sid="+Math.random();  
   xmlHttp.onreadystatechange = stateChanged;  
   xmlHttp.open("GET",url,true) ;  
   xmlHttp.send(null);  
 }