function replaceURLWithHTMLLinks(text)
    {
      var exp = /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
      return text.replace(exp,"<a href='$1'>$1</a>"); 
    }