bookmarklet to reload youtube video at full browser width

mutateyoutube.js

javascript:
var youtubeid = getQueryVariable("v");
if (youtubeid != undefined){
    window.location="http://youtube.googleapis.com/v/"+youtubeid+"&autoplay=1";
}

function getQueryVariable(variable) {
  /* courtesy: http://stackoverflow.com/a/1623707 */
  var query = window.location.search.substring(1);
  var vars  = query.split("&");
  for (var i=0; i < vars.length; i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  } 
  /*alert('Query Variable ' + variable + ' not found');*/
}