我有一个包含旧、新和确认三个字段的表单。我设计了一个 javascript 来检查是否输入了所有字段，但不幸的是这没有按预期工作。请告诉我我在哪里做错了。我是新手javascript
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<style type="text/css">
html, body, div, h1, h2, h3, h4, h5, h6, p, img, dl,
dt, dd, ol, ul, li, table, tr, td, form, object, embed,
article, aside, command, details, fieldset,
figcaption, figure, footer, group, header, hgroup, legend{
margin: 0;
padding: 0;
border: 0;
}
html {
font: 82.5% verdana, helvetica, sans-serif;
background: #fff;
color: #333;
line-height: 1;
direction: ltr;
}
html, body {
position: absolute;
height: 100%;
min-width: 100%;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
.button {
min-width: 46px;
text-align: center;
color: #444;
font-size: 11px;
font-weight: bold;
height: 27px;
padding: 0 8px;
line-height: 27px;
border-radius: 2px;
transition: all 0.218s;
border: 1px solid #dcdcdc;
background-color: #f5f5f5;
cursor: default;
}
*+html .button {
min-width: 70px;
}
button.button,
input[type=submit].button {
height: f1f1f1px;
line-height: 29px;
vertical-align: bottom;
margin: 0;
}
.button:hover {
border: 1px solid #c6c6c6;
color: #333;
text-decoration: none;
transition: all 0.0s;
background-color: #f8f8f8;
box-shadow: 0 1px 1px rgba(0,0,0,0.1);
}
.button:active {
background-color: #f6f6f6;
box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}
.button:visited {
color: #666;
}
.button-submit {
border: 1px solid #3079ed;
color: #fff;
text-shadow: 0 1px rgba(0,0,0,0.1);
background-color: #4d90fe;
}
.button-submit:hover {
border: 1px solid #2f5bb7;
color: #fff;
text-shadow: 0 1px rgba(0,0,0,0.3);
background-color: #357ae8;
}
button-submit:active {
background-color: #357ae8;
box-shadow: inset 0 1px 2px rgba(0,0,0,0.3);
}
.footer-bar {
bottom: 0;
height: 35px;
width: 100%;
overflow: hidden;
}
.content {
padding: 0 44px;
}
.table{
padding: 0 55px
}
.header {
padding: 10px 20px 5px;
background:#00AAFF;
border: 1px solid #e5e5e5;
height:20px;
}
</style>
<script type="text/javascript">
function ccheck()
{
old=document.f1.old.value;
confirm=document.f1.confirm.value;
if(old=="" || old==null)
{
alert("Plz. Enter Your City");
document.f1.old.focus();
return false;
}
if(confirm=="" || confirm==null)
{
alert("Plz. Enter Your State");
document.f1.confirm.focus();
return false;
}
return true;
}
</script>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body bgcolor="">
<form action="checkPassword.jsp" onSubmit="return ccheck()">
<div align="center" style="padding-top: 30px">
<table cellspacing="10" cellpadding="10">
<tr>
<td width="200" height="30"><h5>Old Password</h5></td>
<td height="30"><input name="old"></td>
</tr>
<tr>
<td height="30"><h5>New Password</h5></td>
<td height="30"><input name="NewPsw"></td>
</tr>
<tr>
<td height="30"><h5>Confirm Password</h5></td>
<td height="30"><input name="confirm"></td>
</tr>
</table>
</div>
<div class="footer-bar" align="center" style="padding-top: 30px">
<table align="center" >
<tr >
<td width="100" align="center"><input type="submit" class="button button-submit" value="Submit" /></td>
<td width="100" align="center"><input type="reset" class="button button-submit" value="Reset" /></td>
</tr>
</table>
</div>
</form>
</body>
</html>
相同的 jsfiddle http://jsfiddle.net/YCWu4/