jquery真是我的噩梦！

到底什么错？？为什么老提示
illegal character
[Break on this error] var oInput = #username;\n

经验证，verify方法能够访问，jquery库引入正常，但就是
var oInput = ${"#username"};
alert(oInput.val());
这两句有问题！！！

[code="html"]
<%--
Created by IntelliJ IDEA.
User: ³�¹�
Date: 2009-4-21
Time: 22:56:12
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

Simple jsp page

<br> function verify() {<br> var oInput = ${&quot;#username&quot;};<br> alert(oInput.val());<br> alert(&quot;kkk&quot;);<br> }<br>


请输入用户名：

[/code]

[code="java"]
<%--
Created by IntelliJ IDEA.
User: ³�¹�
Date: 2009-4-21
Time: 22:56:12
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

Simple jsp page

<br> function verify() {<br> //var oInput = ${&quot;#username&quot;};<br> //太低级的错误哦，函数调用怎么会去用&quot;{}&quot;<br> var oInput = $<a href="%22#username%22">color=red</a>;[/color]<br> alert(oInput.val());<br> alert(&quot;kkk&quot;);<br> }<br>


请输入用户名：

[/code]