function a1(url){
	var win;
	win=window.open(url,"Arbeitsbeispiele1","left=0,top=0,width=500,height=680,scrollbars=no");
	win.focus();
	}
	
function a2(url){
	var win;
	win=window.open(url,"Arbeitsbeispiele2","left=0,top=0,width=500,height=680,scrollbars=no");
	win.focus();
	}