form表单验证(非原创)
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Reg</title>
<style>
.state1{
color:#aaa;
}
.state2{
color:#000;
}
.state3{
color:red;
}
.state4{
color:green;
}
</style>
<script src="jquery-1.10.2.min.js" type="text/javascript"></script>
<script>
$(function(){
$('input[name="username"]').keypress(function(){
$(this).next().text('用户名应该为3-20位之间').removeClass('state1').addClass('state2');
}).blur(function(){
if($(this).val().length >= 3 && $(this).val().length <=12 && $(this).val()!=''){
$(this).next().text('输入成功').removeClass('state1').addClass('state4');
ok1=true;
}else{
$(this).next().text('用户名应该为3-20位之间').removeClass('state1').addClass('state3');
}
});
function checkForm(){
var $usersName = $('input[name="username"]');
if($usersName.val().length >= 6 && $usersName.val().length <=20 &&$usersName.val()!=''){
$usersName.next().text('输入成功').removeClass('state1').addClass('state4');
return true;
}else{
$usersName.next().text('密码应该为6-20位之间').removeClass('state1').addClass('state3');
return false;
}
}
//提交按钮,所有验证通过方可提交
$('.submit').click(function(){
if(checkForm()){
$('form').submit();
}else{
return false;
}
});
});
</script>
</head>
<body>
<form action='do.php' method='post' >
用 户 名:<input type="text" name="username">
<span class='state1'>请输入用户名</span><br/><br/>
密 码:<input type="password" name="password">
<span class='state1'>请输入密码</span><br/><br/>
确认密码:<input type="password" name="repass">
<span class='state1'>请输入确认密码</span><br/><br/>
邮 箱:<input type="text" name="email">
<span class='state1'>请输入邮箱</span><br/><br/>
<input type="button" value="提交" id="toSubmitId"/>
<a href="javascript:;"><img id="" class='submit' type='image' src='./images/reg.gif' /></a>
</form>
</body>
