var xmlHttp
var dis;
function calPrice(str,display)
{
	
	dis = display;

	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	  {
		  alert ("Your browser does not support AJAX!");
		  return;
	  } 
	var url="";
	url= str;
	url=url+"&rand="+Math.random();
	
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 

function stateChanged(display) 
{ 
	if (xmlHttp.readyState==4)
	{ 
		
		document.getElementById(dis).innerHTML=xmlHttp.responseText;
		
	
	}
}

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;
}