谢谢回答问题的大牛,感激不尽
问题就是我运行的时候js只会提示用户名没输入。假如我用户名输入了,其他没输入的时候,js却没有报错<%@ page language="java" contentType="text/html; charset=gb2312"%>
<html>
<head>
<title>用户注册</title>
<style type="text/css">
.center {
text-align: center;
}.red {
color: #F00;
}
</style>
<script language="javascript">
function on_submit() {
if (form1.username.value == "") {
alert("用户名不能为空!请输入用户名!");
form1.username.focus();
return false;
}
if (form1.passward.value == "") {
alert("用户密码不能为空!请输入用户密码!");
form1.passward.focus();
return false;
}
if (form1.repassward.value == "") {
alert("用户确认密码不能为空!请输入用户确认密码!");
form1.repassward.focus();
return false;
}
if (form1.repassward.value != form1.passward.value) {
alert("两次密码输入不一致!请重新输入!");
form1.passward.focus();
return false;
}
if (form1.email.value.length != 0) {
for (i = 0; i < form1.email.value.length; i++) {
if (form1.email.value.charAt(i) == "@") {
break;
}
}
if (i == form1.email.value.length) {
alert("输入的电子邮箱地址非法!请重新输入!");
form1.email.focus();
return false;
} } else {
alert("电子邮箱不能为空!请输入电子邮箱!");
form1.email.focus();
return false;
}
}
</script>
</head>
<body> <form method="post"
enctype="multipart/form-data" name="form1"
onSubmit="return on_submit()">
<table width="100%" border="0">
<tr>
<td colspan="2" class="center">用户注册</td>
</tr>
<tr>
<td width="11%">用户名:<span class="red">(*)</span></td>
<td width="89%"><input type="text" name="username"></td>
</tr>
<tr>
<td>密 码:<span class="red">(*)</span></td>
<td><input name="password" type="password"></td>
</tr>
<tr>
<td>确认密码:<span class="red">(*)</span></td>
<td><input name="repassword" type="password"></td>
</tr>
<tr>
<td>性 别:</td>
<td><input type="radio" name="sex" value="男" select> 男 <input
type="radio" name="sex" value="女"> 女</td>
</tr>
<tr>
<td>出生年月:</td>
<td><label for=""></label> <input type="text" size="4"
maxlength="4" name="year">年 <select name="month">
<option value="1" selected>1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
</select>月 <input type="text" size="3" maxlength="3" name="day"> 日</td>
</tr>
<tr>
<td>电子邮箱:<span class="red">(*)</span></td>
<td><input type="text" name="email"></td>
</tr>
<tr>
<td>家庭住址:</td>
<td><input type="text" name="address"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" name="submit" id="button"
value="提交"> <input type="reset" name="button2" id="reset"
value="重置"></td>
</tr>
</table>
</form></body>
</html>
问题就是我运行的时候js只会提示用户名没输入。假如我用户名输入了,其他没输入的时候,js却没有报错<%@ page language="java" contentType="text/html; charset=gb2312"%>
<html>
<head>
<title>用户注册</title>
<style type="text/css">
.center {
text-align: center;
}.red {
color: #F00;
}
</style>
<script language="javascript">
function on_submit() {
if (form1.username.value == "") {
alert("用户名不能为空!请输入用户名!");
form1.username.focus();
return false;
}
if (form1.passward.value == "") {
alert("用户密码不能为空!请输入用户密码!");
form1.passward.focus();
return false;
}
if (form1.repassward.value == "") {
alert("用户确认密码不能为空!请输入用户确认密码!");
form1.repassward.focus();
return false;
}
if (form1.repassward.value != form1.passward.value) {
alert("两次密码输入不一致!请重新输入!");
form1.passward.focus();
return false;
}
if (form1.email.value.length != 0) {
for (i = 0; i < form1.email.value.length; i++) {
if (form1.email.value.charAt(i) == "@") {
break;
}
}
if (i == form1.email.value.length) {
alert("输入的电子邮箱地址非法!请重新输入!");
form1.email.focus();
return false;
} } else {
alert("电子邮箱不能为空!请输入电子邮箱!");
form1.email.focus();
return false;
}
}
</script>
</head>
<body> <form method="post"
enctype="multipart/form-data" name="form1"
onSubmit="return on_submit()">
<table width="100%" border="0">
<tr>
<td colspan="2" class="center">用户注册</td>
</tr>
<tr>
<td width="11%">用户名:<span class="red">(*)</span></td>
<td width="89%"><input type="text" name="username"></td>
</tr>
<tr>
<td>密 码:<span class="red">(*)</span></td>
<td><input name="password" type="password"></td>
</tr>
<tr>
<td>确认密码:<span class="red">(*)</span></td>
<td><input name="repassword" type="password"></td>
</tr>
<tr>
<td>性 别:</td>
<td><input type="radio" name="sex" value="男" select> 男 <input
type="radio" name="sex" value="女"> 女</td>
</tr>
<tr>
<td>出生年月:</td>
<td><label for=""></label> <input type="text" size="4"
maxlength="4" name="year">年 <select name="month">
<option value="1" selected>1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
</select>月 <input type="text" size="3" maxlength="3" name="day"> 日</td>
</tr>
<tr>
<td>电子邮箱:<span class="red">(*)</span></td>
<td><input type="text" name="email"></td>
</tr>
<tr>
<td>家庭住址:</td>
<td><input type="text" name="address"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" name="submit" id="button"
value="提交"> <input type="reset" name="button2" id="reset"
value="重置"></td>
</tr>
</table>
</form></body>
</html>
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建议改为用document.getElementById('password').value来获password的值 当然<input name="password" type="password">要加上id<input name="password" type="password" id="password">
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<%--
request.setCharacterEncoding("gb2312");
--%>
<%
out.println(request.getParameter("username"));
%>
</body>
</html>
<form method="post"
enctype="multipart/form-data" name="form1"
onSubmit="return on_submit()">你的form没有指定跳转的指定页面,加上action='aaa.jsp'
吧enctype="multipart/form-data"删掉 这个属性在上传文件的时候才会用到
form.jsp<%@ page language="java" contentType="text/html; charset=gb2312"%>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<form action="acceptUserRegist.jsp" method="post" name="form1">
<input name="username" type="text" id="username" >
<input name="submit" type="button" value="提交"></form>
</body>
</html>acceptUserRegist.jsp<%@ page language="java" contentType="text/html; charset=gb2312"%>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<%--
request.setCharacterEncoding("gb2312");
--%>
<%
out.println(request.getParameter("username"));
%>
</body>
</html>