function openLarge(filename) {
	var winLeft = 0;
	var winTop = 0;
	var width = 540;
	var height = 440;
	if (document.all || document.layers) {
	//  winLeft = (screen.availWidth - width) / 2;
	//  winTop = (screen.availHeight - height) / 2;
	}
	
    if (window.NewsWindow) NewsWindow.close();
	if (navigator.appName == 'Microsoft Internet Explorer') {
	    msgWindow=open(filename,"GalleryWin","toolbar=no,width="+width+",height="+height+",directories=no,status=no,scrollbars=no,resize=no,menubar=yes,top=" + winTop + ",left=" + winLeft);
	} else { 
	    msgWindow=open(filename,"GalleryWin","toolbar=no,width="+width+",height="+height+",directories=no,status=no,scrollbars=no,resize=no,menubar=yes,screenX=" + winLeft + ",screenY=" + winTop);
	}	
    if (msgWindow.opener == null) msgWindow.opener = self;
	msgWindow.focus();
}