function changeSubmitButton(ID,SRC){

    window.document.getElementById(ID).src = SRC;
    }
	
	
function openWindow(URL, winName, width, height, left, top) {

	var FensterBreite = screen.width;
	
	var LinkePosition = parseInt((FensterBreite - 802)/2);
	var TopPosition = 150;
	
	var left = (typeof(left) == "undefined") ? LinkePosition : left;
	var top = (typeof(top) == "undefined") ? TopPosition : top;
	var width = (typeof(width) == "undefined") ? 400 : width;
	var height = (typeof(height) == "undefined") ? 400 : height;
 
	if (window.Fenster && !Fenster.closed) {
	    Fenster.focus();
		true; }
    
	Fenster = window.open(URL, winName, "left="+left+",top="+top+",width="+width+",height="+height+",scrollbars=no, menubar=yes, toolbar=yes");
  }