extract vimeo video id from the url

Though this question is available on SO, I am facing a little problem.I failed to extract the vimeo id using vimeo regex used here: Vimeo Regex

My codes I,m using now:

function vimeoProcess(url){
   var vimeoReg = /https?:\/\/(?:www\.)?vimeo.com\/(?:channels\/(?:\w+\/)?|groups\/([^\/]*)\/videos\/|album\/(\d+)\/video\/|)(\d+)(?:$|\/|\?)/;
   var match = url.match(vimeoReg);
   if (match){
      console.log(match[3]);
   }else{
      return "<span class='error'>error</span>";
   }
}

It does not consoles any thing. Can any one help?