GridView CheckBox实现全选

<input id="chkSelectedAll" type="checkbox" onclick="chkSelectAll(this)" />全选

<script type="text/javascript">
		    function chkSelectAll(oCheck)
		    {
		        //获取Table对象
		        var oTable = document.getElementById("GridView1");
		        if(oTable)
		        {
		            //获取Table内所有input对象
		            var oInputs = oTable.getElementsByTagName("input");
		            //遍历所有Input对象
		            for(var i=0;i<oInputs.length;i++)
		            {
		                //判断Input的类型是否为"checkbox"
		                if (oInputs[i].type=="checkbox")
		                {
		                    oInputs[i].checked = oCheck.checked;
		                }
		            }
		        }
		    }
</script>