function imgOn(imgName) {
	   if (document.images) {
    	   document[imgName].src = "/images/buttons/" + imgName + "_on.gif";
       }
	}
	
	function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = "/images/buttons/" + imgName + "_off.gif";
        }
	}
	
	function openWindow(link, name, width, height) {
    	window.open(link, name, 'width='+width+',height='+height+',top='+screen.availTop+',left='+screen.availLeft+',resizable=yes,toolbar=yes,menubar=yes,scrollbars=yes,location=yes,status=yes');
	}