$(document).ready(function() {
  $('.helplink').bind('click', function() {

    var winW = 1200, winH = 900;

    if (document.body && document.body.offsetWidth) {
      winW = document.body.offsetWidth;
      winH = document.body.offsetHeight;
    }
    if (document.compatMode == 'CSS1Compat' && document.documentElement && document.documentElement.offsetWidth) {
      winW = document.documentElement.offsetWidth;
      winH = document.documentElement.offsetHeight;
    }
    if (window.innerWidth && window.innerHeight) {
      winW = window.innerWidth;
      winH = window.innerHeight;
    }

//    alert(winW+" x "+winH);

    window.open(this.href,'vmhelp','width='+winW+',height='+winH);
    return false;
  });
});