<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>测试页面</title>
<script type="text/javascript">
function checkform(){
//验证用户名
if($("username").value == ""){
$("n_msg").innerHTML ="用户名不可以为空";
$("username").select();
$("username").focus();
return false;
}else{
if($("username").value.length < 6){
$("n_msg").innerHTML = "用户名必须大于6个字符";
$("username").select();
$("username").focus();
return false;
}
}
//验证密码
if($("password").value == ""){
$("p_msg").innerHTML ="密码不可以为空";
$("password").select();
$("password").focus();
return false;
}else{
if($("password").value.length < 10){
$("p_msg").innerHTML = "密码必须大于10个字符";
$("password").select();
$("password").focus();
return false;
}
}
//.....（下面的可以以此类推）
return true;
}
function $(id){
return document.getElementById(id);
}
</script>
<style type="text/css">
body{ font:12px 宋体}
.c_red{ color:#f00}
</style>
</head>
<body>
<table width="500" border="0" cellspacing="0" cellpadding="0">
<form method="post" onsubmit="return checkform()">
<tr>
<td width="89">用户名</td>
<td width="223"><input name="username" type="text" id="username" /></td>
<td width="188" id="n_msg" class="c_red"></td>
</tr>
<tr>
<td>密码</td>
<td><input name="password" type="password" id="password" /></td>
<td id="p_msg" class="c_red"></td>
</tr>
<tr>
<td colspan="3"><input name="sub" type="submit" id="sub" value="提交" /></td>
</tr>
</form>
</table>
</body>
</html>
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