JS for 60 seconds Countdown effect (using jquery)

Today met to achieve a similar kind of SMS verification code 60 Seconds Countdown Demand, long time not to write JS, a little rusty. Record the code to facilitate follow-up inspection. Here I used the Jquey, after all, it is simple to write. Look directly at the effects and code below. First, the effect                                                                           Two, code (1) HTML

 
   
  

  
    
   
<input type="button" id="btn" value="免费获取验证码" onclick="daojishi(10,this)" /> 
 
   
  

Attention:to introduce jquery

(2) JS

  
 

   
  

  
<script type="text/javascript"> 
   
  

  
function daojishi(seconds,obj){
   
  

  
if (seconds > 1){
   
  

  
seconds--;
   
  

  
$(obj).val(seconds+"秒后可重新获取 ").attr("disabled", true);//禁用按钮
   
  

  
// 定时1秒调用一次
   
  

  
setTimeout(function(){
   
  

  
daojishi(seconds,obj);
   
  

  
},1000);
   
  

  
}else{
   
  

  
$(obj).val("免费获取验证码").attr("disabled", false);//启用按钮
   
  

  
}
   
  

  
}
   
  

  
</script> 
  
 

JS for 60 seconds Countdown effect (using jquery)