function OpenWindow(PictureName,W,H)
{
	//add white space around the image
	H += 25; W += 25;
	
	//center it on the page
	var winl = (screen.width - W) / 2;
	if (winl < 0)
		winl = 0;
	var wint = (screen.height - H) / 2;
	if (wint < 0)
		wint = 0;
		
	//open new window with name of picture
	var placeFront = "images/";
	var settings = "resizable=no, width=" + W + ", height=" + H;
	settings += ", top=" + wint +", left=" + winl;
	window.open(placeFront + PictureName, 'PictureName', settings);	
}