var xmlHttp

function call_ajaxx(str)
	{ 
	
		xmlHttp=GetXmlHttpObject()
		if (xmlHttp==null)
			 {
			 alert ("Browser does not support HTTP Request")
			 return
			 }
		var url="getModel.php"
		url=url+"?q="+str
		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")
 { 
  response=xmlHttp.responseText;
  document.getElementById('my_submit_bttn').disabled=false;
  document.getElementById("my_model").innerHTML=response;
	}
   
}

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;
}