var xmlHttp

function calc(value, action, data){
	
	var response_field = 'results';
	
	if (value.length==0) { 
		value = 'M';
		action = 'START';
	}
	
	xmlHttp=GetXmlHttpObject();

	if (xmlHttp==null){
  		alert ("Your browser does not support AJAX!");
  		return;
	} 

	var url="_scripts/calc.php";
	url=url+"?section="+value;
	url=url+"&action="+action;
	url=url+"&data="+data;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=function(){
	
		if (xmlHttp.readyState==4){ 
			document.getElementById(response_field).innerHTML=xmlHttp.responseText;
		}
		//else{document.getElementById(response_field).innerHTML= "<table width='100%' border='0' cellpadding='0' cellspacing='0' bgcolor='#f1f3e9'><tr><td align='center'><br><br><img src='../../../images/how_to_buy/loan_calc/loading.gif' width='96' height='20'><br><br><br></td></tr></table>";}
	}
	
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 


function GetXmlHttpObject(){

	var xmlHttp=null;
	
	try{xmlHttp=new XMLHttpRequest();}// Firefox, Opera 8.0+, Safari

	catch (e){ // Internet Explorer
	  	try{xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");}
	  	catch (e){xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");}
  	}
	
	return xmlHttp;
}