function doPrint(url) {
	theWidth = 400;
	theHeight = 400;
	theTop = Math.ceil((screen.height-theHeight*1.5)/2);
	theLeft = Math.ceil((screen.width-theWidth)/2);
	winopts = "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=yes,resizable=yes,copyhistory=0,width="+theWidth+",height="+theHeight+",top="+theTop+",left="+theLeft;
	smallwindow=window.open(url,"Print",winopts);
  smallwindow.focus();
}

function changeImage(url) {
	document.getElementById("BigImage").src = url;	
}