function swapImg(imageName, imageFile) {
	var newImg = new Image();
	newImg.src = "matimgs/" + imageFile;

	//alert(newImg.src);
	eval("document."+imageName+".src = newImg.src;");
}
function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=750,height=500');");
}