js effect achieved 60s countdown message codes used for obtaining

Sometimes we need to send text messages to the user by clicking a button, you need a timing effect.

<button id = "msg" type = "button" style = "width: 120px; height: 30px"> Get text verification </ Button> 
       <Script the src = "http://cdn.bootcss.com/jquery/1.11. . 3 / jquery.min.js "> </ Script> 
    <Script type =" text / JavaScript "> 
	 var COUNT = 60, Timer = null; 
     $ (" MSG # ") the Click (function (). 
	 {     
          / * prevent users repeatedly clicking the button * / 
	   IF (Timer == null) { 
	   Timer = the setInterval (function () {COUNT -; $ ( "MSG #") text (COUNT + "Get codes after the second");. 
           IF (COUNT <= 0) {clearInterval (timer); $ ( "# msg") text ( " click for code");. Timer = null;}}, 1000); 
	   } 
	}); 

    </ Script>

　　

display effect: