function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

var preloadFlag = false;
function preloadImages() {

	if (document.images) 
	{
	   img1 = new newImage("images/groupshotcolor.jpg");
	   img2 = new newImage("images/vocation_btn_on.jpg");
	   img3 = new newImage("images/apart_btn_on.jpg");	
	   img4 = new newImage("images/share_btn_on.jpg");	
	   preloadFlag = true;

	}

}