在velocity vm中如何显示java script函数的返回值

<pre name="code" class="javascript"><html >
<head>
    #parse("/layout/head.vm")    
    <script language="javascript">     
      //@parameter: datestr (format: "yyyy-mm-dd")
      //@return : String ("mm-dd-yyyy")      
      function FormatToUSDate(dateStr) {
         if(dateStr) {
		  var d=dateStr.split("-");
		  var retStr=d[1]+"-"+d[2]+"-"+d[0];
		  return retStr;  
		 }  
      }            
     </script>           
</head>
<body>
        <th> 
          <span id="myMessage"></span> 
	  <script type="text/javascript">  
              var dateString =("$!dataSend.get('queryTime')").toString();				 
             $('#myMessage').html(FormatToUSDate(dateString));
	   </script>						      
        </th>	
</body>
</html>

下面这条语句是关键
$('#myMessage').html(FormatToUSDate(dateString));