Implement form validation based on Jquery_jquery
Sometimes when we register an account and log in to the system, we can only submit when all verifications are passed. This requires Jquery to implement form verification. Today I will share with you a piece of code to implement form verification based on Jquery.
<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.js"></script>
<script>
$(function(){
var ok1=false;
var ok2=false;
var ok3=false;
var ok4=false;
// 验证用户名
$('input[name="username"]').focus(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');
}
});
//验证密码
$('input[name="password"]').focus(function(){
$(this).next().text('密码应该为6-20位之间').removeClass('state1').addClass('state2');
}).blur(function(){
if($(this).val().length >= 6 && $(this).val().length <=20 && $(this).val()!=''){
$(this).next().text('输入成功').removeClass('state1').addClass('state4');
ok2=true;
}else{
$(this).next().text('密码应该为6-20位之间').removeClass('state1').addClass('state3');
}
});
//验证确认密码
$('input[name="repass"]').focus(function(){
$(this).next().text('输入的确认密码要和上面的密码一致,规则也要相同').removeClass('state1').addClass('state2');
}).blur(function(){
if($(this).val().length >= 6 && $(this).val().length <=20 && $(this).val()!='' && $(this).val() == $('input[name="password"]').val()){
$(this).next().text('输入成功').removeClass('state1').addClass('state4');
ok3=true;
}else{
$(this).next().text('输入的确认密码要和上面的密码一致,规则也要相同').removeClass('state1').addClass('state3');
}
});
//验证邮箱
$('input[name="email"]').focus(function(){
$(this).next().text('请输入正确的EMAIL格式').removeClass('state1').addClass('state2');
}).blur(function(){
if($(this).val().search(/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/)==-1){
$(this).next().text('请输入正确的EMAIL格式').removeClass('state1').addClass('state3');
}else{
$(this).next().text('输入成功').removeClass('state1').addClass('state4');
ok4=true;
}
});
//提交按钮,所有验证通过方可提交
$('.submit').click(function(){
if(ok1 && ok2 && ok3 && ok4){
$('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/>
<a href="javascript:;"><img class='submit' type='image' src='./images/reg.gif' /></a>
</form>
</body>
</html>The above is the entire content of this article, I hope you all like it.
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