title: styling height of an input type file button
body: <p>I'm trying to style an input type file with an image. so far, so good, but now I want to set the height of that button on 40px. The problem is that, somehow, this button has a fixed height and even when i put !important next to the 40px of the size, the button still shows the original height. can somebody help me with this? thank you
  here it is the html:</p>
  
  <pre><code>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
     "http://www.w3.org/TR/html4/strict.dtd"&gt;
  &lt;HTML&gt;
    &lt;HEAD&gt;
    &lt;LINK href="main.css" rel="stylesheet" type="text/css"&gt;
    &lt;/HEAD&gt;
    &lt;BODY&gt;
  &lt;input type="text" id="fileName" class="file_input_textbox" readonly="readonly"&gt;
  
  &lt;div class="file_input_div"&gt;
    &lt;input type="button" value="" class="file_input_button" /&gt;
    &lt;input type="file" class="file_input_hidden" onchange="javascript: document.getElementById('fileName').value = this.value" /&gt; 
  &lt;/div&gt;
  </code></pre>
  
  <p>and the css:</p>
  
  <pre><code>.file_input_textbox
  {
      float: left;
      background: none repeat scroll 0 0 #FF554B;
      border: medium none;
      color: #FFFEFA;
      font-family: 'InterstateBold';
      font-size: 11px;
      margin: 0;
      padding: 12px 15px;
      width: 647px;
  }
  
  .file_input_div
  {
      position: relative; 
      width: 100px; 
      height: 23px; 
      overflow: hidden;
  }
  
  .file_input_button
  {
      position: absolute; 
      top: 0px;
      background:url(btn-newsletter.jpg) no-repeat;
      color: #FFFFFF;
      border-style: none;
      width:40px;
      height:40px !important;
  }
  
  .file_input_button:hover
  {
  
      background:url(btn-newsletter2.jpg) no-repeat !important;
  
  }
  
  .file_input_hidden
  {
      font-size: 45px; 
      position: absolute; 
      right: 0px; 
      top: 0px; 
      opacity: 0; 
  
      filter: alpha(opacity=0); 
      -ms-filter: "alpha(opacity=0)"; 
      -khtml-opacity: 0; 
      -moz-opacity: 0;
  }
  </code></pre>