jQuery: Checking browser support

The jQuery Code START
    
    <script type="text/javascript" src="./jquery-1.5.1.js"></script>
    <script src="http://code.jquery.com/jquery-latest.js"></script>
  
    <script type="text/javascript">
      $(document).ready(function() {
        if($.support.boxModel) {
          $('#first').html("I support the W3C box model.");    
        } 
        else {
          $('#first').html("I do not support the W3C box model.");    
        }
        
        if($.support.cssFloat) {
          $('#second').html("I use style.cssFloat to access current CSS float value.");    
        } 
        else {
          $('#second').html("I do not use style.cssFloat to access current CSS float value.");    
        }
        
        if($.support.hrefNormalized) {
          $('#third').html("I support hrefNormalized.");    
        } 
        else {
          $('#third').html("I do not support hrefNormalized.");    
        }
        
        if($.support.hrefSerialize) {
          $('#fourth').html("I support proper link serialization when innerHTML is used.");    
        } 
        else {
          $('#fourth').html("I do not support proper link serialization when innerHTML is used.");    
        }
        
        if($.support.leadingWhitespace) {
          $('#fifth').html("I preserve leading Whitespace with innerHTML.");    
        } 
        else {
          $('#fifth').html("I do not preserve leading Whitespace with innerHTML.");    
        }
        
        if($.support.noCloneEvent) {
          $('#sixth').html("I do not clone event handlers.");    
        } 
        else {
          $('#sixth').html("I do clone event handlers.");    
        }

      });
    </script>
    
    <style type="text/CSS">
        <!--
        .code { color: red; }
        .back { background-color: yellow; }
        -->
   </style>
  </head>

  <body>
    <h1>jQuery: Checking browser support</h1>
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