测试一下js是否可用

 1 <p>
 2 <script type="text/javascript">// <![CDATA[
 3 window.addEventListener("load",eventWindowLoaded,false);
 4      function eventWindowLoaded(){
 5          runTest();
 6      }
 7      function runTest(){
 8          var thediv=document.getElementById("alexTestDiv");
 9          thediv.innerHTML="I like javascript";
10      }
11 // ]]></script>
12 </p>
13 <div id="alexTestDiv">我的测试</div>