<script>
//获取id,倒数的值,设定定时器的名字,点击计时器开始(先清除计时器,标签失效,设定定时器,设定函数,倒数值减少,如果倒数值大于0,内容变;小于,标签变回,内容变回,计时器停止,倒数值变回);
varbtn =
document.getElementById("btn");
varcount =
5;
vartimer =
null;
btn.onclick=
function(){
clearInterval(timer);
this.disabled=
true;
varthat
=this;
timer =setInterval(sendText,1000);
functionsendText(){
count--;
if(count
>= 0){
that.innerHTML=
""+ count +"秒后重新发送短信";
}else{
that.disabled=
false;
that.innerHTML=
"重新发送短信";
clearInterval(timer);
count =5;
}
}
}
</script>