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) {
		pic_btns_02_over = newImage("images/pic_btns_02-over.jpg");
		pic_btns_03_over = newImage("images/pic_btns_03-over.jpg");
		pic_btns_04_over = newImage("images/pic_btns_04-over.jpg");
		pic_btns_05_over = newImage("images/pic_btns_05-over.jpg");
		preloadFlag = true;
	}
}

function popup(mylink, windowname)
{
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
   href=mylink;
else
   href=mylink.href;
window.open(href, windowname, 'width=600,height=630,scrollbars=no');
return false;
}