JS获取短信验证码button的定时重新发送

HTML:

<button id="getCode" type="button" class="code-item pull-right">短信验证码</button>

JS:

//"获取短信验证码" 
$('#getCode').unbind('click').click(function (event){
event.preventDefault();
time(this);
});

//获取短信验证码
var wait=60;
function time(o) {
if (wait == 0) {
o.removeAttribute("disabled");
o.innerHTML="获取动态码";
wait = 60;
} else {
o.setAttribute("disabled", true);
o.innerHTML="重新发送(" + wait + ")";
wait--;
setTimeout(function() { time(o) }, 1000) 
}
}