//javascript:NewWindow('http://www.site.com','popup','500','550','yes');

var win= null;

function NewWindow(mypage,myname,w,h,scroll)

{

  var winl = (screen.width-w)/2;

  var wint = (screen.height-h)/2;

  var settings  ='height='+h+',';

      settings +='width='+w+',';

      settings +='top='+wint+',';

      settings +='left='+winl+',';

      settings +='scrollbars='+scroll+',';

      settings +='resizable=yes';

  win=window.open(mypage,myname,settings);

  if(parseInt(navigator.appVersion) >= 4){win.window.focus();}

}