/**
 * Funktionssammlung fuer die Behandlung von HttpRequests
 *
 */

//---------------------------------- Aussfuehren des HttpRequests ----------------------------------//
http_request = false;
function httpReq(url, fkt) {
	
    http_request = false;
    
    if (typeof XMLHttpRequest != "undefined") {
        http_request = new XMLHttpRequest;
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType("text/xml");
        }
    }
    if (!http_request) {
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {
                http_request = null;
            }
        }
    }
    if (!http_request) {
        alert("Ende :( Kann keine XMLHTTP-Instanz erzeugen");
        return false;
    }
    http_request.onreadystatechange = fkt;
    http_request.open("GET", url, true);
    http_request.send(null);
    
}