function wkup(source){
	var amount = $(source).val();
	amount ++;
	$(source).val(amount);
}

function wkdown(source){
	var amount = $(source).val();
	if(amount > 1 ){
		amount --;
		$(source).val(amount);
	}	
}

function showmpay24(adresse,breite,hoehe,linktext) {

var showmpay24 = "<a href='#zzz' onclick=\"window.open('" + adresse + "','mpay','toolbar=no,location=yes,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=" + breite + ",height=" + hoehe + ",left=20,top=20')\">" + linktext + "</a>";

window.document.writeln(showmpay24);

}