menu1_on = new Image();	menu1_on.src = "images/select_de_on.jpg";  menu1_off = new Image();  menu1_off.src = "images/select_de_off.jpg";
menu2_on = new Image();	menu2_on.src = "images/select_en_on.jpg";  menu2_off = new Image();  menu2_off.src = "images/select_en_off.jpg";

function mOver(sImg, sWhat)
{
if (document.images && document.images[sImg]){
	document.images[sImg].src = eval(sImg + "_" + sWhat + ".src");
	}
}

function position_bg(){

	var iWidth  = 0;
	var iHeight = 0;

	if (document.body) {
	  // for IE
	  iWidth  = document.body.clientWidth;
	  iHeight = document.body.clientHeight;

	} else {
	  // everybody else
	  iWidth  = window.innerWidth;
	  iHeight = window.innerHeight;

	}

	
	var mitte = (iWidth/2)+75;
	
	var SomeCalculatedValue      = 50+mitte;
	var SomeOtherCalculatedValue = 50;


	// apply to body
	var TheStyle = document.getElementById("myBody").style;
	TheStyle.backgroundPosition = SomeCalculatedValue+"px "+SomeOtherCalculatedValue+"px";
	
}