function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		profile_over = newImage("images/profile-over.gif");
		art_over = newImage("images/art-over.gif");
		street_over = newImage("images/street-over.gif");
		nature_over = newImage("images/nature-over.gif");
		portraits_over = newImage("images/portraits-over.gif");
		projects_over = newImage("images/projects-over.gif");
		contact_over = newImage("images/contact-over.gif");
		home_over = newImage("images/home-over.gif");
		preloadFlag = true;
	}
}

function winpic(ID) { 
   swidth = (screen.width-780)/2;
   sheight = (screen.availHeight-600)/2
   var Win = window.open('photo.php?id=' + ID,'Win','width=780,height=600,top=' + sheight + ',left=' + swidth + ',resizable=yes,scrollbars=yes');
   Win.focus();
}