javascript页面加载完执行事件代码

复制代码 代码如下:
<script type="text/javascript" language="JavaScript">  

             //: 判断网页是否加载完成  
              document.onreadystatechange = function () {  
                 if(document.readyState=="complete") {         
                      alert('ok');
                  }  
              }  

          </script>