if (document.images) {

		img1on = new Image();
		img1on.src = "images/btn_home_on.gif";
		img2on = new Image();
		img2on.src = "images/btn_public_on.gif";
		img3on = new Image();
		img3on.src = "images/btn_private_on.gif";
		img4on = new Image();
		img4on.src = "images/btn_archives_on.gif";
		
		img1off = new Image();
		img1off.src = "images/btn_home.gif";
		img2off = new Image();
		img2off.src = "images/btn_public.gif";
		img3off = new Image();
		img3off.src = "images/btn_private.gif";
		img4off = new Image();
		img4off.src = "images/btn_archives.gif";
		
	}


	function imgOn(imgName) {
	
		if (document.images) {
	
			document[imgName].src = eval(imgName + "on.src");
	
		}
	
	}
	
	function imgOff(imgName) {
	
		if (document.images) {
	
			document[imgName].src = eval(imgName + "off.src");
	
		}
	
	}
	
	function pop(URL, name, width, height, menu, scroll) {
	
		window.open(URL, name, 'width='+width+',height='+height+',location=no,status=no,directories=no,menubar='+menu+',scrollbars='+scroll+',noresize');
		
	}