急！求教onclick后如何调用一个函数 把数据传回数据库？

[xybgmg]

我在写一个注册页面
下边是jsp的部分代码

<div align="center">
	    <form id="ff" method="post" action="reg">
	    	<table cellpadding="5">
	    		<tr>
	    			<td>用户名:</td>
	    			<td><input class="easyui-textbox" type="text" name="userName" data-options="required:true"></input></td>
	    		</tr>
	    		<tr>
	    			<td>密码:</td>
	    			<td><input class="easyui-textbox" type="password" name="userPass" data-options="required:true"></input></td>
	    		</tr>
	    		<tr>
	    			<td>生日:</td>
	    			<td><input class="easyui-textbox" type="text" name="birthday" data-options="required:true"></input></td>
	    		</tr>
	    		<tr>
	    			<td>邮箱:</td>
	    			<td><input class="easyui-textbox" type="text" name="email" data-options="required:true,validType:'email'"></input></td>
	    		</tr>
	    		
	    	</table>
	    	<div style="text-align:center;padding:20px">
	<div style="text-align:center;padding:20px">
	    	<a href="javascript:void(0)" class="easyui-linkbutton" onclick="<%return Reg()%>">Submit</a>        
	    	<a href="javascript:void(0)" class="easyui-linkbutton" onclick="clearForm()">Clear</a>
	   		</div>

我希望按完submit后 就能把注册信息传回数据库 该怎么写" onclick="<%return Reg()%>">Submit</a> 部分呢？怎么调用下边那个函数？我已经反转了hibernate
下面是Reg.java

import com.operate.UserinfoOperate;

public class Reg extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String userName = request.getParameter("userName");
		String userPass = request.getParameter("userPass");
		String birthday = request.getParameter("birthday");
		String email = request.getParameter("email");
		
		try {
			UserinfoOperate.addUser(userName, userPass, birthday, email);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		
		response.getWriter().print("success registered");
	}

[天际的海浪]

用ajax方式提交，资料网上有的是，自己去查吧

[hch126163]

ajax 提交 form 提交 img,script,iframe src 属性请求