// JavaScript Document
// open centered popup window
var popupWindows = new Array();
function popupWindow(href, name, width, height)	{
	for (var i = 0; i < popupWindows.length; i++) {
		if (popupWindows[i][0] == name && popupWindows[i][1].closed == false) {
			popupWindows[i][1].focus();
			return false;
		}
	}			
	var left = parseInt((screen.availWidth/2) - (width/2));
	var top = parseInt((screen.availHeight/2) - (height/2));
	var windowFeatures = "width=" + width + ",height=" + height + ",status=0,resizable=0,location=0,menubar=0,scrollbars=1, titlebar=0, toolbar=0,left=" + left + ",top=" + top + ",screenX=" + left + ",screenY=" + top;
	var index = popupWindows.length;
	popupWindows[index] = new Array();
	popupWindows[index][0] = name;
	popupWindows[index][1] = window.open(href, name, windowFeatures);
}