var xmlHttp

function showhint(par1,par2) {
	if (par1.length==0) { 
  		document.form.getElementById("netto_inkomen_4weken").value="";
  		return;
  	}
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {
	  alert ("Your browser does not support AJAX!");
  	  return;
	} 
	
	var url="php/calculate.php";
	url=url+"?par1="+par1;
	url=url+"&type="+type;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 

function stateChanged() { 
	if (xmlHttp.readyState==4){ 
		document.getElementById("netto_inkomen_4weken").value=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;
}