function ajax(url,callback)
{	
  xmlhttp=GetXmlHttpObject();
  if (xmlhttp==null)
  {
    alert ("Your browser does not support XMLHTTP! - Please upgrade.");
    return;
  }
  xmlhttp.onreadystatechange=statePriceChanged;
  xmlhttp.open("GET",url,true);
  xmlhttp.send(null);
}

function ajax_new(url,callback)
{	
  xmlhttp=GetXmlHttpObject();
  if (xmlhttp==null)
  {
    alert ("Your browser does not support XMLHTTP! - Please upgrade.");
    return;
  }
  xmlhttp.onreadystatechange=stateCartUpdated;
  xmlhttp.open("GET",url,true);
  xmlhttp.send(null);
}

function updateDiv(sendId, divId)
{

	if (document.getElementById(sendId).checked == "")
	{
		//it is becoming unchecked.
		var blah = "unchecked";
	} else {
		//it is becoming unchecked.
		var blah = "checked";
	}

	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
		alert ("Your browser does not support XMLHTTP! - Please upgrade.");
		return;
	}

	var url="ajax/price.php";
	url=url+"?checkvalue="+blah;
	ajax(url,statePriceChanged);
	
	var thisURL = returnURL;
}


function statePriceChanged()
{
	if (xmlhttp.readyState == 4)
	{
		var id = xmlhttp.responseText;
		if (!id)
		{
			alert("Error - Please refresh and try again.");
		} else {
			var id = xmlhttp.responseText;
			document.getElementById("coursePrice").innerHTML=id;
		}
	}
}

function GetXmlHttpObject()
{
	if (window.XMLHttpRequest)
	{
	// code for IE7+, Firefox, Chrome, Opera, Safari
	return new XMLHttpRequest();
	}
	if (window.ActiveXObject)
	{
	// code for IE6, IE5
	return new ActiveXObject("Microsoft.XMLHTTP");
	}
	return null;
}

function updateCartPage()
{
  if (document.getElementById("IPPAMember").checked == "")
  { 
	var blah = "unchecked";
  } else {
	var blah = "checked";
  }

  xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
		alert ("Your browser does not support XMLHTTP! - Please upgrade.");
		return;
	}

	var url="ajax/price.php";
	url=url+"?checkvalue="+blah;
	ajax_new(url,stateCartUpdated);
	
	var thisURL = returnURL;
}

function stateCartUpdated()
{
	if (xmlhttp.readyState == 4)
	{
		var id = xmlhttp.responseText;
		if (!id)
		{
			alert("Error - Please refresh and try again.");
		} else {
			document.theForm.submit();
		}
	}
}