$("#<%=StoreNameClientID %>")focus(function() {
$("#<%=LabelClientID %>")val("請輸入真實的店鋪名稱");
$("#<%=LabelClientID %>")css("color" "#");
});
html中
<table>
<tr>
<td>
店鋪名稱
</td>
<td>
<asp:TextBox ID="StoreName" runat="server"></asp:TextBox>
</td>
<td>
<asp:Label ID="Label" runat="server" Text=" 真實的店鋪名稱個字（必填項）"></asp:Label>
</td>
</tr>
</table>
From:http://tw.wingwit.com/Article/program/Java/JSP/201311/20497.html
