霸道小豆丁 用javascript简单写的判断*

手机号：<input  type="text" class="loginuser" placeholder="请输入您的手机号"  id="uid" onblur="checkPhone()" />
                <span id="uidt" style="margin-left: 100px"></span>

function checkPhone(){
        var phone = document.getElementById('uid').value;
        if(!(/^1[34578]d{9}$/.test(phone))){
            return document.getElementById('uidt').innerHTML = '请输入正确的手机号';
            return false;
        }        else{return document.getElementById('uidt').innerHTML = 'ok';}
    }