/**
 * Popup Javascript
 */
function popup(w,h,site) {
  x = screen.availWidth/2-w/2;
  y = screen.availHeight/2-h/2;
  var popupWindow = window.open(site,'','toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=1,resizable=1,width='+w+',height='+h+',left='+x+',top='+y+',screenX='+x+',screenY='+y);
  popupWindow.focus;
}