Javascript to gt client width and height.

gistfile1.js

 function getClient(e)
  {
    var h, w, de;
    if (e) {
      w = e.clientWidth;
      h = e.clientHeight;
    } else {
      de = document.documentElement;
      w = window.innerWidth || self.innerWidth
          || (de&&de.clientWidth) || document.body.clientWidth;
      h = window.innerHeight || self.innerHeight
          || (de&&de.clientHeight) || document.body.clientHeight;
    }
    // test it.
    // alert(h+":"+w);
    return {w:w,h:h};
  }