GridView全選的JScript實現)

全選按鈕在在form中放個html的checkbox控制項
<input id="CheckboxSelectAll" title="全選" type="checkbox"  onclick="SelectAll()" />全選

function SelectAll()
{
        var grid = document.getElementById("GridView1");
        if(grid == null)
        {
            alert("還沒有任何記錄");
            return;

            var checkBoxs = grid.getElementsByTagName('INPUT');
            for(var i=0;i<checkBoxs.length;i++)
            {
                if(checkBoxs[i].type=='checkbox')
                {
                    checkBoxs[i].checked = true;
                }
            }
      }
}