给自定义Web控件添加事件(前后台代码)

<scriptsrc="js/Jquery1.7.js"type="text/javascript"></script>
<scripttype="text/javascript">
functionRegister(){
if($("#myRegister1_txtUserName").val()==""){
$("#spanUserName").text("请输入用户名");
returnfalse;
}
if($("#myRegister1_txtPwd").val()==""){
$("#spanPwd").text("请输入密码");
returnfalse;
}
if($("#myRegister1_txtPwd1").val()==""){
$("#spanPwd1").text("请输入密码");
returnfalse;
}
if($("#myRegister1_txtPwd1").val()!=$("#myRegister1_txtPwd").val()){
$("#spanPwd1").text("两次密码要一致");
returnfalse;
}
if($("#myRegister1_txtEmail").val()==""){
$("#spanEmail").text("请输入邮箱");
returnfalse;
}
returntrue;
}
</script>
<table>
<tr>
<td>用户名:</td>
<td>
<asp:TextBoxID="txtUserName"runat="server"></asp:TextBox></td>
<td><spanid="spanUserName"></span></td>
</tr>
<tr>
<td>密码:</td>
<td>
<asp:TextBoxID="txtPwd"runat="server"></asp:TextBox></td>
<td><spanid="spanPwd"></span></td>
</tr>
<tr>
<td>确认密码:</td>
<td>
<asp:TextBoxID="txtPwd1"runat="server"></asp:TextBox></td>
<td><spanid="spanPwd1"></span></td>
</tr>
<tr>
<td>邮箱:</td>
<td>
<asp:TextBoxID="txtEmail"runat="server"></asp:TextBox></td>
<td><spanid="spanEamil"></span></td>
</tr>
<tr>
<td></td>
<td>
<asp:ButtonID="btnRegister"runat="server"Text="注册"
onclick="btnRegister_Click"OnClientClick="returnRegister()"/></td>
<td>
<asp:LabelID="Label1"runat="server"Text=""></asp:Label>
</td>
</tr>
</table>