var isNS		= (navigator.appName.indexOf("Netscape") != -1) ? true : false;
var isNS4	= (isNS && parseFloat(navigator.appVersion) >= 4) ? 1 : 0;
var isIE		= (document.all) ? 1 : 0;
var isIE5		= (isIE && navigator.appVersion.indexOf("5.") >= 0) ? 1 : 0;

function WinCenter(wfile, wname, ww, wh) {
	var maxwidth, maxheight;
	var xpos, ypos;

	if (isNS4 || isIE) {
		maxwidth 	= (isNS4?innerWidth:screen.availWidth);
		maxheight	= (isNS4?innerHeight:screen.availHeight);
		xpos = maxwidth/2 - ww/2;
		ypos = maxheight/2 - wh/2 -20;
	}

	return open(wfile, wname,"left="+xpos +",top="+ypos +",width="+ww +",height="+wh +",resizable=1,scrollbars=1,menubar=no");
}

var PhotoWin;
function ViewPhoto(filename)
{
	if (PhotoWin==null || PhotoWin.closed) {
		PhotoWin = WinCenter("ViewPhoto.asp?src="+filename,"PhotoWin",310,330);
	} else {
		PhotoWin.location.href = "ViewPhoto.asp?src="+filename;
	}
	return;
}