平常这类需求在挪动端比较罕见，就是经由过程手机注册账号嘛，轻易。
http://jsbin.com/vagocaqitu/edit?html,css,js,output
贴了个jsbin的代码片断，发明没有预览。。。
为啥只能用jsfiddle的呢？速率太慢了吧
https://jsfiddle.net/6zr4Lb5p/embedded/result,html,css,js/

javascriptvar getCode = document.getElementById('getCode');
var wait = 60;
function time(btn){
    if (wait===0) {
        btn.removeAttribute("disabled");
        btn.innerHTML = "猎取验证码";
        wait = 60;
    }else{
        btn.setAttribute("disabled",true);
        btn.innerHTML = wait + "秒后重试";
        wait--;
        setTimeout(function(){
            time(btn);
        },1000);
    }
}
getCode.onclick = function(){
    time(this);
};