function DOMCall(name) {
	if (document.layers) 
		return document.layers[name];
	else if (document.all)
		return document.all[name];
	else if (document.getElementById)
		return document.getElementById(name);
}
function showPic (whichpic) {
	DOMCall('placeholder').src = whichpic.href;
 	return false;
}
function clickedImage (whichpic) {
	imageUrl = whichpic.src;  // grab the url of the medium image.
	imageUrl = imageUrl.replace(/images/gi, "images/large"); // add in the "large" dir so we can display the big picture
	imageWindow = window.open("popup.php?z="+imageUrl,'imageWin','width=640,height=480');  // popup the image in a new window set width and height to your max values
}