if (TextBoxTest.Text == "")
{
Response.Write("<script language='javascript'>");
Response.Write("alert('" + message + "');");
Response.Write("</script>"); return;
}
{
Response.Write("<script language='javascript'>");
Response.Write("alert('" + message + "');");
Response.Write("</script>"); return;
}
<script language=javascript>
function check()
{
if(document.form1.textbox.value=="")
{
alert("不能为空");
textbox.focus();
}
}
</script>
<form id="form1" runat="server" onsubmit="return(check());">
忘记了