// Makes an ajax request call to a passed php page
// relies on a querybuilder function in html page that builds query string
// puts the results of the request into an element whose ID=results
//
// Written by David Pugh (Dave_P) August 2008

var xmlHttp

function AJAXRequest(phpurl) {

	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	  {
	  alert ("Your browser is incompatable with these pages, please upgrade")
	  return
	  } 
	  
	var url= phpurl;
	url=url+"?"+querybuilder()+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
	}
	
	function stateChanged() 
	{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	 { 
		document.getElementById("results").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;
}