title: window.clipboardData.getData("Text") returns 0 in IE8
body: <p>I'm trying to implement maxlength on a textarea.  In IE7, <code>window.clipboardData.getData("Text")</code> returns the correct number of characters copied. in IE8, the same call returns 0. What's wrong?</p>
  
  <p>here is the js</p>
  
  <pre><code>var someRule= {
    "textarea" : function(element) {
      element.onpaste = function() {
        var copied = window.clipboardData.getData("Text");
        alert('copied length = '+copied.length);
      }
    }
  };
  
  Behaviour.register(someRule);
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/8yrGt.jpg" alt="alt text"></p>