/*
The following script is for replacing a centered popup window.
 this is the code to place into the html <a href="http://www.domain.com/" onClick="popupCentered('http://www.apple.com/','500','300'); return false;">...</a>
*/

 var isNav4, isIE4, isMac;
 if (parseInt(navigator.appVersion.charAt(0)) >= 4) {
 isNav4 = (navigator.appName == "Netscape") ? true : false
 isNav6 = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) == 5) ? true : false
 isIE4 = (navigator.appName.indexOf("Microsoft") != -1) ? true : false
 isMac = (navigator.platform.indexOf("Mac") != -1) ? true : false
 }


 function popupCentered(url) {
 if (isNav4 || isIE4) {
 var screenPosX,screenPosY;
 screenPosX = (screen.availWidth - 418) / 2;
 screenPosY = (screen.availHeight - 595) / 2; 

 if (isNav4 || isNav6) { 
 window.open(url,'','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1, copyhistory=0,width=418, height=595 ,screenX='+screenPosX+',screenY='+screenPosY+'' );
 }

 if (isIE4) {
 newwin = window.open(url,'','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1, copyhistory=0,width=418 ,height=595 ,left='+screenPosX+',top='+screenPosY+''); 
 }
 }

 else {
 window.open(url,'', 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1, copyhistory=0,width=418 ,height=595');
 }
 }