Code
<script language="javascript" type="text/javascript">
function add()
{
var userid = document.getElementById("<%=((TextBox)GridView1.FooterRow.FindControl("tb_userid")).ClientID%>").value;
var userpwd = document.getElementById("<%=((TextBox)GridView1.FooterRow.FindControl("tb_userpwd")).ClientID%>").value;
var username = document.getElementById("<%=((TextBox)GridView1.FooterRow.FindControl("tb_username")).ClientID%>").value;
if (userid == "")
{
alert("用户ID不能为空！");
return false;
}
if (userpwd == "")
{
alert("密码不能为空！");
return false;
}
if (username == "")
{
alert("姓名不能为空！");
return false;
}
else
{
return true;
}
}
</script