GridView中嵌入JS脚本实现全选功能

1，代码：

<asp:TemplateField>
                    <ItemTemplate>
                        <input type='checkbox' name='PKey' value='<%# DataBinder.Eval(Container.DataItem, "id") %>' />
                    </ItemTemplate>
                </asp:TemplateField>

 

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<PagerTemplate>
                <asp:HyperLink ID="lnkCheckAll" runat="server" Text="全选" NavigateUrl="javascript:CheckAll(true);"></asp:HyperLink>
                -
                <asp:HyperLink ID="lnkClearAll" runat="server" Text="取消" NavigateUrl="javascript:CheckAll(false);"></asp:HyperLink>
                &nbsp; &nbsp; <a href="#" onclick="onDelete('labelinformation.aspx'); return false;">
                    删除</a>
                <br />
                <table>
                    <tr>
                        <td>
                            <pcontrol:PagerControl ID="ctlPagerControl" runat="server" />
                        </td>
                    </tr>
                </table>
            </PagerTemplate>

2，脚本：

 

    <script>
    function CheckAll(checked)
     {
         for( var i=0; i < document.forms[0].elements.length; i++)
          if (document.forms[0].elements[i].name=='PKey')
         document.forms[0].elements[i].checked=checked;
     }
    </script>

    <script>
         function onDelete(url)
      
          {
             var count=0;
             var keyid ="";
             var objList = document.getElementsByName("PKey");
             for(i=0;i<objList.length;i++)
               {
                  if(objList[i].checked)
                    {
                     if(count>0) keyid+=",";
                     keyid += objList[i].value;
                     count++;
                     }
               }
              
          if(count==0)
          {
          Ext.MessageBox.alert("请确认","您未选择任何记录!");return;
          }
         
         if(! Ext.MessageBox.confirm("请确认","您确定要删除选择的记录吗?",function(btn)
          {
          if (btn == 'yes')
          {
             self.location.href= url + "?type=delete&keyid=" + keyid;
          }
         })          
        
         );    
    
     }
    </script>