js实现按钮的滑动效果

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 通过更改按钮的显示样式,来实现按钮动态滑动
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
    <html xmlns="http://www.w3.org/1999/xhtml">  
    <head>  
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
    <title>无标题文档</title>  
    </head>   
    <style>    
      
    .search{ background:#008800; color:#fff; border:none; height:26px; line-height:20px; width:63x;}  
    .searchhover{background:#000099; color:#fff; border:none; height:26px; line-height:20px; width:63px; }   
    </style>    
      
      
    </head>    
    <body onload="js()">    
       <input type="button"   id="btn" class="search"  name="btn" value="登 录"/>    
       <input type="button"   id="btn2" class="search"  name="btn" value="注 销"/>    
      <script type="text/javascript" >     
       
    function js()  
    {  
     // 使ie6 button支持hover属性 obj是要支持hover的实体  hover是btn:hover的样式,init是初始样式      
     obj="btn";  
     alert(navigator.appName);  
     if(navigator.appName == "Microsoft Internet Explorer" && parseFloat(navigator.appVersion) == 4){// 判断ie6     
      var o = document.getElementsByName(obj);    
      for(var i=0;i<o.length;i++){   
       if(o[i].type == "button"){     
        //o[i].className = "search";     
        o[i].onmouseover = function(){ this.className = "searchhover"}     
        o[i].onmouseout  = function(){ this.className = "search"};     
       }     
      }     
     }     
     }   
    </script>     
    </body>    
    </html>