JS SMS Verification Code Countdown effect

<div class= "Input-group" id= "Login_do" ><input type= "num" class= "Form-control inputd" id= "TelCode" Placeholder= "SMS Verification Code"/><span class= "Input-group-addon input-span-black" style= "Display:none" >120s after re-acquisition < /span><span class= "Input-group-addon input-span-white" >&nbsp;</span><a href= "javascript: void (0) "id=" Getcaptcha "class=" Input-group-addon input-span-orange "> Get SMS Verification Code </a><input type=" hidden " Value= "1" name= "Start" id= "Start"/><span class= "Input-group-addon input-span-white" >&nbsp;</span ></div>

<script type= "Text/javascript" >    var start =  document.getElementById (' Start ') .value;    var getcaptcha =  document.getElementById (' Getcaptcha '); Var login_do   = document.getelementbyid (' Login _do ')  ;start = 0;  $ (function () {    if (start == 1) {     startexcute ();}}) Var wait = 120;function timecaptcha (obj)  {         if  (wait == 0)  {        obj.setattribute (" Disabled ",  false);                        obj.innerhtml= "Resend";             login_do.style.background =  "#ff7c8a";             login_do.style.boxShadow =  "0 5px 0 0 # e9717e ";             getcaptcha.style.color =   "#fff";                       wait = 120;        }  else {                     obj.innerHTML= wait +  "Resend after second";             obj.setattribute ("Disabled",  true);             wait--;                        settimeout (function ()  {     &Nbsp;      timecaptcha (obj)              },            1000);             getCaptcha.onclick = null;         }        if (  obj.innerhtml ==  "Resend") {        getcaptcha.onclick =  function  () {        obj.innerhtml= wait +  " Seconds to Resend ";        login_do.style.background = " #dbdbdb ";             login_do.style.boxShadow =  "0  5px 0 0  #cbcbcb ";             getcaptcha.style.color = "#000";             //obj.setattribute ("Disabled",  true);             settimeout (function ()  {            timecaptcha (obj)              },             1000);             getcaptcha.onclick = null;             Resendcaptcha ();        }                 }    }getcaptcha.onclick =  function  () {Timecaptcha (this);} Function startexcute () {getcaptcha.innerhtml= wait +  "resend in Seconds"; Getcaptcha.setattribute ("Disabled",  true);            wait--;             settimeout (function ()  {             timecaptcha (Getcaptcha)              },             1000);             getcaptcha.onclick  = null;} Function resendcaptcha () {var  phone = $ ("#phone"). Val (); var  url =   "{: U (' Register/ajaxsendcode ')}",  $.post (url,{phone:phone},function (data) {/*alert (data)    if (data.error != 0 ) {  showalert ("Zhezhao2", "ShowDiv2", "zhe2");   }*/}, ' JSON '); return false;}

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JS SMS Verification Code Countdown effect