I'm using jquery versin 1.4.1 and trying to implement jLoader 0.1, but when I use it ... I get this error from firebug ..

1. ie is null
2.          if (ie[0].match("MSIE")) {\n                                                                    jLoader.js (línea 205)

This is the code of my page

1. <script language="javascript" src="jquery.js"></script>
   <script language="javascript" src="jLoader.js"></script>
   <style type="text/css">
   div {
       font-family:Verdana, Arial, Helvetica, sans-serif;
       font-size: 11px;
   }
   </style>
   
   <script language="javascript">
   $(document).ready(function(){    
      $('#Loader').click(function() {
           var loader = new Loader("#dialog", {showProgress:true, showProgressText:true, textSize:15});
           loader.Start();
       })    
   });</script>
   <input id="Loader" name="" type="button" value="mostrar jLoader" />
   
   <div id="dialog" style="display:none" title="Espere por favor ..." align="center">
       <img src="loading.gif" height="50px" width="50px"/>
   </div>