javascript - 文本验证

Question

我知道这是不正确的，但我想知道如何实现一种验证，因此当输入正确时，背景变为绿色，或者如果不正确变为红色，让我们使用电子邮件示例。http://jsfiddle.net/dm6Hm/20/

<input type="email" class="Email" value="Email"/>

(".Email").change(function(e) {
    var $test = $(this).css("background-color", "");
    if ($test.val() == "email@email.com") {
        setTimeout(function() {
            $test.css("background-color", "green").focus();
        }, 0);
    }
});

Answer 1

function isEmail(email){
    var reg = /^(\w)+(\.\w+)*@(\w)+((\.\w+)+)$/;
    return reg.test(email);
}

$(".Email").keyup(function(e) {
    var $test = $(this).css("background-color", "");
    if (isEmail($test.val())) {
        setTimeout(function() {
            $test.css("background-color", "green").focus();
        }, 0);
    }else{
        setTimeout(function() {
            $test.css("background-color", "red").focus();
        }, 0);
    }
});

Answer 2

for correct input-->

   $('.Email').focus(function() {
        $('.Email').css('border','1px solid green');
    });

for incorrect input:

 $('.Email').blur(function() {
        $('.Email').css('border','1px solid red');
    });

你需要改变你的事件

Answer 3

$(".Email").keyup(function(e) {
    var $test = $(this).css("background-color", "");
    if ($test.val() === "email@email.com") {
        setTimeout(function() {
            $test.css("background-color", "green").focus();
        }, 0);
    }else{
        setTimeout(function() {
            $test.css("background-color", "red").focus();
        }, 0);
    }
});