`

Select Tag's options process

prototypeJavaScriptXMLHTMLC 
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xml 代码
  1. <html>  
  2. <head>  
  3.   <script src="file:///E:\FrameWork\prototype\prototype-1.4.0\dist\prototype.js"></script>  
  4.      
  5.   <script language="javascript">  
  6.       
  7.       
  8.     function f1()   
  9.     {   
  10.        var els=$('s1').getElementsByTagName('option');   
  11.        // 没有i++   
  12.        for(var i=0;i<els.length;){   
  13.          // alert(els[i].innerHTML);   
  14.          $('s1').removeChild(els[i]);   
  15.        }   
  16.     }   
  17.        
  18.     function f2()   
  19.     {   
  20.        el1=document.createElement('option');   
  21.        el1.value="aa";   
  22.        el1.innerHTML="bb";   
  23.        $('s1').appendChild(el1);   
  24.           
  25.     }   
  26.   </script>     
  27.      
  28. </head>  
  29. <body>  
  30.   <select id="s1">  
  31.     <option>A</option>  
  32.     <option>B</option>  
  33.     <option>C</option>  
  34.     <option>D</option>  
  35.   </select>  
  36.      
  37.   <input type="button" onclick="f1()" value="del">  
  38.   <input id="b2" type="button" onclick="f2()" value="add">  
  39.      
  40.   <a href="create_opener_el.html" target="_blank" >asdf</a>  
  41.      
  42. </body>  
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