function createRequestObject() {
    		var ro;
    		var browser = navigator.appName;
    		if(browser == "Microsoft Internet Explorer"){
        		ro = new ActiveXObject("Microsoft.XMLHTTP");
    		}else{
       			 ro = new XMLHttpRequest();
    		}
    			return ro;
}

var http = createRequestObject();

function sndReq(uid) {
    http.open('get', 'index.php?id=162&tx_rmcommercedirectorder_pi1[showUid]='+uid , false);
	//http.onreadystatechange = handleResponse;
    http.send(null);
	return http.responseText;
}


function checkNumber(articleid) {

	var uid = sndReq(articleid);
 	

	if(uid != 0) {
		return true;
	} else {
		document.getElementById('articleerror').innerText = "Diese Artikelnummer existiert nicht.";
		document.getElementById('articleerror').firstChild.data = "Diese Artikelnummer existiert nicht.";
		return false;		
	}
}