//Ajax-Funktionen

    var http_request = false;

    function macheRequest(url) {

        http_request = false;
		var sizeValue = document.getElementById('id1').value;
		var size_id = 'size_id=' + sizeValue;

        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('Ende :( Kann keine XMLHTTP-Instanz erzeugen');
            return false;
        }
        http_request.onreadystatechange = alertInhalt;
		
        http_request.open('POST', url, true);
		http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

        http_request.send(size_id);

    }

    function alertInhalt() {



        if (http_request.readyState == 4) {

			if (http_request.status == 200) {
                var xmldoc = http_request.responseXML;
				var root_node = xmldoc.getElementsByTagName('root').item(0);

								var node_value = root_node.firstChild.data;
								
				
				
				var obj = document.forms["cart_quantity1"].elements["cart_quantity"];
				if(obj)
				{
					//alert(document.forms[0].elements["cart_quantity"].options.length);
					document.forms[0].elements["cart_quantity"].options.length = 0;

					for (var i = 1; i <= node_value; i++) {
						meinObjekt = new Option(i, i);
						document.forms[0].elements["cart_quantity"].options[i-1] = meinObjekt;
					}
				}	
				

				var obj = document.forms["cart_quantity2"].elements["cart_quantity"];
				if(obj)
				{
					//alert(document.forms[1].elements["cart_quantity"].options.length);
					document.forms[1].elements["cart_quantity"].options.length = 0;
					for (var i = 1; i <= node_value; i++) {
						meinObjekt = new Option(i, i);
						document.forms[1].elements["cart_quantity"].options[i-1] = meinObjekt;
					}
				}


            } else {
                alert('Bei dem Request ist ein Problem aufgetreten.');
            }
        }

    }