<%@page contentType="text/html;charse=gb2312"%>
<script>
function on_submit(){
if(form1.username.value==""){
alert("用户名不能为空");
form1.username.focus();
return false;}
if(form1.userpassword.value==""){
alert("密码不能为空");
form1.userpassword.focus();
return false;}
if(form1.reuserpassword.value==""){
alert("确认密码不能为空");
form1.reuserpassword.focus();
return false;}
if（form1.userpassword.value!=form1.reuserpassword.value){
alert("密码与确认不同");
form1.userpassword.focus();
return false;}
var patrn=/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
if(!patrn.text(form1.email.value)){
alert("email地址不正确");
form1.email.focus();
return false;}
}
</script>
<form name="form1" onsubmit="return on_submit()">
用户名：<input>(*)<br>
密码：<input type="password"name="userpassword">(*)<br>
确认密码：<input type="password"name="reuerpassword">(*)<br>
性别：<input type="radio" value="男" name="sex" checked>男
<input type="radio" value="女" name="sex">女<br>
电子邮箱：<input name="email"><br>
<input type="submit" value="注册">
</form>
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