function popWin(url, name, width, height, center) {
	var thisTop = 20;
	var thisLeft = 20;
	if (center) {
		if (screen) {
			screenW = screen.availWidth;
        		screenH = screen.availHeight;
			if (screenW>width) {
				thisLeft = (screenW/2)-(width/2);
			}
			if (screenH>height) {
				thisTop = (screenH/2)-(height/2);
			}
		}
	}
	window.open(url, name, "width=" + width + ",height=" + height + ",top=" + thisTop + ",left=" + thisLeft + ",resizable=no,scrollbars=no,status=yes");
	
}

var preloadNavFlag = false;
function preloadNavImages() {
     if (document.images) {
		document.nav1over = newImage("images/wb.wo.nav.over_01.gif");
		document.nav2over = newImage("images/wb.wo.nav.over_02.gif");
		document.nav3over = newImage("images/wb.wo.nav.over_03.gif");
		document.nav4over = newImage("images/wb.wo.nav.over_04.gif");
		document.nav5over = newImage("images/wb.wo.nav.over_05.gif");
		document.nav6over = newImage("images/wb.wo.nav.over_06.gif");
		document.nav7over = newImage("images/wb.wo.nav.over_07.gif");
		document.nav8over = newImage("images/wb.wo.nav.over_08.gif");
		document.nav9over = newImage("images/wb.wo.nav.over_09.gif");
		document.nav10over = newImage("images/wb.wo.nav.over_10.gif");
		document.nav1on = newImage("images/wb.wo.nav.on_01.gif");
		document.nav2on = newImage("images/wb.wo.nav.on_02.gif");
		document.nav3on = newImage("images/wb.wo.nav.on_03.gif");
		document.nav4on = newImage("images/wb.wo.nav.on_04.gif");
		document.nav5on = newImage("images/wb.wo.nav.on_05.gif");
		document.nav6on = newImage("images/wb.wo.nav.on_06.gif");
		document.nav7on = newImage("images/wb.wo.nav.on_07.gif");
		document.nav8on = newImage("images/wb.wo.nav.on_08.gif");
		document.nav9on = newImage("images/wb.wo.nav.on_09.gif");
		document.nav10on = newImage("images/wb.wo.nav.on_10.gif");
		document.nav1off = newImage("images/wb.wo.nav.off_01.gif");
		document.nav2off = newImage("images/wb.wo.nav.off_02.gif");
		document.nav3off = newImage("images/wb.wo.nav.off_03.gif");
		document.nav4off = newImage("images/wb.wo.nav.off_04.gif");
		document.nav5off = newImage("images/wb.wo.nav.off_05.gif");
		document.nav6off = newImage("images/wb.wo.nav.off_06.gif");
		document.nav7off = newImage("images/wb.wo.nav.off_07.gif");
		document.nav8off = newImage("images/wb.wo.nav.off_08.gif");
		document.nav9off = newImage("images/wb.wo.nav.off_09.gif");
		document.nav10off = newImage("images/wb.wo.nav.off_10.gif");
          preloadNavFlag = true;
     }
}

function newImage(filename) {
     if (document.images) {
          rslt = new Image();
          rslt.src = filename;
          return rslt;
     }
}

function changeImages(imgId,sTo) {
     if (document.images && (preloadNavFlag == true)) {
		document[imgId].src = document[imgId+sTo].src;
     }
}