var http_request = false;
var http_request_destFormName = '';
var http_request_destLayerName = '';
var http_request_lastMandantID = 0;

function makeRequest(url, resultHandler, frmnamesrc, frmdestination, layerid, LastMandantID) 
{
	// bei MakeRequest alle Dynamic Felder sperren - mehrmals aufruf verhindern
	//http://developer.mozilla.org/De/AJAX/Getting_Started

	http_request = false;

	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest(); //http://msdn.microsoft.com/en-us/library/ms535874(VS.85).aspx
		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('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange = resultHandler; //  eventHandler der aufgerufen wird wenn aufruf fertig
	http_request_destFormName = frmdestination;
	http_request_destLayerName = layerid;
	http_request_lastMandantID = LastMandantID;
	if (frmnamesrc)
	{
		var c = 0;
		var s = '';
		var f = document.forms[frmnamesrc];
		while(c <= f.elements.length-1)
		{
			s += (s.length>0?'&':'') + f.elements[c].name + '=' + f.elements[c].value;
			c++;
		}
		http_request.open('POST', url, true);
		http_request.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
		http_request.send(s);
	}
	else
	{
		http_request.open('GET', url, true);		
		// Caching Problem
		//http://radio.javaranch.com/pascarello/2005/10/21/1129908221072.html
		http_request.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
		http_request.send(null);
	}

}