//AJAX
function addURLParam(sURL, sParamName, sParamValue)
 {
  sURL += (sURL.indexOf("?") == -1 ? "?" : "&");
  sURL += encodeURIComponent(sParamName) + "=" + encodeURIComponent(sParamValue);
  return sURL;
}

function alertContents(div,http_request)
{
	if (http_request.readyState == 4)
	{
		 if (http_request.status == 200)
		 {
				result = http_request.responseText;
				changetext(div,result);
		 }
		 else
		 {
				alert('There was a problem with the request.');
		 }
	}
}

function makeRequest(method,url, parameters,div)
{
	var http_request = false;
	if (window.XMLHttpRequest)
	{ // Mozilla, Safari,...
		 http_request = new XMLHttpRequest();
		 if (http_request.overrideMimeType)
		 {
				http_request.overrideMimeType('text/xml');
		 }
	}
	else if (window.ActiveXObject)
	{ // IE
		 try
		 {
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch (e)
			{
				try
				{
					 http_request = new ActiveXObject("Microsoft.XMLHTTP");
				}
				catch (e)
				{
				}
		 }
	}
	if (!http_request)
	{
		 alert('Cannot create XMLHTTP instance');
		 return false;
	}
	//http_request.onreadystatechange = alertContents;
	http_request.onreadystatechange = function(){alertContents(div,http_request);}
	if (method=='GET')
	{
		http_request.open('GET', url + parameters, true);
		http_request.send(null);
	}
	else if (method=='POST')
	{
		http_request.open('POST', url, true);
		http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		http_request.setRequestHeader("Content-length", parameters.length);
		http_request.setRequestHeader("Connection", "close");
		http_request.send(parameters);
	}
}
//AJAX