var nn5 = document.layers ? true : false;
var ie5 = document.getElementById ? true : false;

var label = new Array("produkte","service","aktuelles","kontakt","unternehmen");
if (ie5)	{
	var width = (document.body.clientWidth - 770)/2;
	for (j=0;j<label.length;j++){
		var lay =label[j]+"_lay";
		document.getElementById(lay).style.left = width;
	}		
}
else if (nn5){
	var width = ((window.innerWidth  - 770)/2)+2;
	for (h=0;h<label.length;h++){
		var lay =label[h]+"_lay";
		document.layers[lay].left = width;
	}
}