js实现表单项的全选、反选以及删除操作

<html>
<head>
<title>test</title>
<script language="javascript">
function ReSel(){
    for(i=0;i<document.form1.logs.length;i++){  //这一用法只对form表单有效
        document.form1.logs[i].checked = true;  //如果是实现【全不选】的话，改成false即可
    }
}
function SeSel(){
    for(i=0;i<document.form1.logs.length;i++){
        if(document.form1.logs[i].checked) document.form1.logs[i].checked = false;
        else document.form1.logs[i].checked = true;
    }
}
function DelSel(){
     var nid = getCheckboxItem();
     if(nid==""){
          alert("请选择项目!\r\n");
          return ;
     }
     location.href = "member_activation.php?dopost=del&ids="+nid;
}
//获得选中文件的文件名
function getCheckboxItem(){
     var allSel="";
     if(document.form1.logs.value) return document.form1.logs.value;
     for(i=0;i<document.form1.logs.length;i++)
     {
         if(document.form1.logs[i].checked){
             if(allSel=="")
                 allSel=document.form1.logs[i].value;
             else
                 allSel=allSel+"-"+document.form1.logs[i].value;
         }
     }  

     return allSel;
}
</script>  

</head>
<body>  

<table>
    <tr>
      <td>列表</td>
    </tr>
    <tr>
      <td>选择</td>
      <td>id</td>
      <td>名字</td>
    </tr>
    <form name="form1">
         {foreach  name="list"  key='key' item='val'}
        <tr>
          <td><input name='logs' type='checkbox' value='{$val.id/}' /></td>
          <td>{$val.id}</td>
          <td>{$val.name}</td>
        </tr>
        {/foreach}
    </form>
    <tr bgcolor="#ffffff">
     <td height="36" colspan="9">
        <a class="coolbg" onClick="ReSel();" >全选</a>
        <a class="coolbg" onClick="SeSel();" >反选</a>
        <a class="coolbg" onClick="DelSel();">删除</a>
     </td>
    </tr>
</table>  

</body>
</html>