function init(what) {

   if(document.body.offsetHeight) {
	     weite = document.body.offsetWidth;		 
	 }
	 if(window.innerHeight) {
	     weite = window.innerWidth;			 
	 }
	 
	 if(weite<=900) {
	 		weite = 900;
	 }
	 w = Math.floor(weite - 900)/2;
	 if((2*w)==(weite-1)) {
	 		w1 = w;
			w2 = w+1;
	 }else{
	 		w1 = w;
			w2 = w;
	 }
	 
	 if(what == 'content') {
	 		w2 = w2 - 17;
	 }
	 
	 
	 document.getElementById('spacer1').style.width = w1;
	 document.getElementById('spacer2').style.width = w2;
	document.getElementById('spacer1').style.height = 1;
	 document.getElementById('spacer2').style.height = 1;
	 //alert("spacer links (w1): "+w1+"\nspacer rechts (w2): "+w2);

}