function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		 window.onload = func;
	} else {
		window.onload = function() {
			if (oldonload) {
				oldonload();
			}
			func();
		}
	}
}


<!-- PRÜFUNG KONTAKTFORMULAR //-->
function checkform(){
	var fehler = "";
	if(document.forms[1].Name.value == ""){
		fehler+= "Bitte geben Sie Ihren Namen an.\n";
	}
	if(document.forms[1].Vorname.value == ""){
		fehler+= "Bitte geben Sie Ihren Vornamen an.\n";
	}
	if(document.forms[1].Firma.value == ""){
		fehler+= "Bitte geben den Firmennamen an.\n";
	}
	if(document.forms[1].Strasse.value == ""){
		fehler+= "Bitte geben die Strasse an.\n";
	}
	if(document.forms[1].Postleitzahl.value == ""){
		fehler+= "Bitte geben die Postleitzahl an.\n";
	}
	if(document.forms[1].Ort.value == ""){
		fehler+= "Bitte geben den Ort an.\n";
	}
	if(document.forms[1].Land.value == ""){
		fehler+= "Bitte geben das Land an.\n";
	}
	if(document.forms[1].Telefon.value == ""){
		fehler+= "Bitte geben eine Telefonnummer an.\n";
	}
	if(document.forms[1].Email.value == ""){
		fehler+= "Bitte geben Sie Ihre Email-Adresse an.\n";
	}

	if (fehler){
		alert (fehler);
		return false;
	}

}

function checkformenglisch(){
	var fehler = "";
	if(document.forms[1].Name.value == ""){
		fehler+= "Please fill in your name.\n";
	}
	if(document.forms[1].Vorname.value == ""){
		fehler+= "Please fill in your prename.\n";
	}
	if(document.forms[1].Firma.value == ""){
		fehler+= "Please fill in the name of the company.\n";
	}
	if(document.forms[1].Strasse.value == ""){
		fehler+= "Please fill in the name of the street.\n";
	}
	if(document.forms[1].Postleitzahl.value == ""){
		fehler+= "Please fill in the postal code.\n";
	}
	if(document.forms[1].Ort.value == ""){
		fehler+= "Please fill in the name of the city.\n";
	}
	if(document.forms[1].Land.value == ""){
		fehler+= "Please fill in the name of the country.\n";
	}
	if(document.forms[1].Telefon.value == ""){
		fehler+= "Please fill in your phone number.\n";
	}
	if(document.forms[1].Email.value == ""){
		fehler+= "Please fill in your E-mail-adress.\n";
	}

	if (fehler){
		alert (fehler);
		return false;
	}



}
<!-- ENDE PRÜFUNG KONTAKTFORMULAR //-->


function checkformNewsticker(){
	var fehler = "";
	if(document.forms[1].Name.value == ""){
		fehler+= "Bitte geben Sie Ihren Namen an.\n";
	}
	if(document.forms[1].Vorname.value == ""){
		fehler+= "Bitte geben Sie Ihren Vornamen an.\n";
	}
	if(document.forms[1].Email.value == ""){
		fehler+= "Bitte geben Sie Ihre Email-Adresse an.\n";
	}

	if (fehler){
		alert (fehler);
		return false;
	}
}


<!--
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
'  Autor:		Joachim Sigwart, www.schau-platz.net
'				info@schau-platz.net
'  Description:	Menuescript mit Popdown
'  Last Update:	06.08.2007
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/

var dom = document.getElementById?1:0;
var ns4 = document.layers?1:0;

function showMenu(name,number) {
	var groups = 2;			/*  NICHT VERGESSEN  */
	for (count = 1; count <= groups; count++) {
		var content = name + count;
		var active = name + number;

		if(dom) {
			if(content == active) {
    			document.getElementById(active).style.visibility = 'visible';
	    		document.getElementById(active).onmouseover = clearShut;
    			document.getElementById(active).onmouseout = setShut;
			} else {
				document.getElementById(content).style.visibility = 'hidden';
	   		}
		}
		else if(ns4) {
			if(content == active) {
    			document[active].visibility = 'show';
    			document[active].onmouseover = clearShut;
	    		document[active].onmouseout = setShut;
 			} else {
			    document[content].visibility = 'hide';
	   		}
	  	}
	}
	first = name, sec = number;
	clearShut();
}

function setShut() { 
	timer = setTimeout("shut(first,sec)", 200);
}

function clearShut() {
	if(window.timer)
	clearTimeout(timer);
}

function shut(first,sec) {
	var active = first + sec;
	if(dom)
 		document.getElementById(active).style.visibility = 'hidden';
 	else if(ns4)
 		document[active].visibility = 'hide';
}
//-->