function openViewer(url) {
	var window_width = 1024;
	var window_height = 640;
	var winName = "portfolio_viewer";
	var features = "toolbar=yes,location=no,status=no,menubar=no,scrollbars=no,resizable=yes,width=" + window_width + ",height=" + window_height;
	var w = window.open(url,winName,features);
	w.moveTo(screen.availWidth/2-512,screen.availHeight/2-320)
	w.focus();
}
function resizeWindow() {
	window.moveTo(0,0);
	if (document.all) {
		top.window.resizeTo(screen.availWidth,screen.availHeight);
	} else if (document.layers||document.getElementById) {
		if (top.window.outerHeight<screen.availHeight||top.window.outerWidth<screen.availWidth){
			top.window.outerHeight = screen.availHeight;
			top.window.outerWidth = screen.availWidth;
		}
	}
}