给GridView文本加上边框

function showborder()
{
    var len=document.all("GridView1").rows.length;
    document.getElementById("GridView1").rows[len-1].cells[4].style.border="1px solid #0000FF";
    alert(document.getElementById("GridView1").rows[len-1].cells[4].innerHTML);
}

 protected void Page_Load(object sender, EventArgs e)
{
　　Button1.Attributes["onclick"] = "showborder()";
}