首先写一个按钮:
<input type="button" id="btn" value="免费获取验证码" onclick="time(this)" />
然后写js代码:
var wait=60;
function time(o){
if (wait==0) {
o.innerHTML="重新发送验证码";
o.style.backgroundColor="#388BE8";
o.removeAttribute("disabled");
wait=60;
}else{
o.setAttribute("disabled", true);
o.innerHTML=wait+"秒后重新获取";
o.style.backgroundColor="#8f8b8b";
wait--;
setTimeout(function(){
time(o)
},1000)
} }
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