title: JQuery masked input plugin does not work on IE7
body: <p>I'm using Jquery Masked input plugin 
  <a href="http://digitalbush.com/projects/masked-input-plugin/" rel="nofollow">http://digitalbush.com/projects/masked-input-plugin/</a></p>
  
  <p>According to the changelog it should support IE7</p>
  
  <p>When when trying to use it on IE7 It's does not work and I'm getting the following error in IE debugger</p>
  
  <p><strong>Object doesn't support property or method 'mask'</strong> </p>
  
  <p>My code :</p>
  
  <pre><code>$("#" + "someid").mask(someformat);
  </code></pre>
  
  <p>The same code work on all other browsers 
  including IE8 and above.</p>