1 <!DOCTYPE html> 2 <html> 3 <head> 4 <script src="js/jquery-1.9.1.min.js"></script> 5 <script type="text/javascript"> 6 var countdown=60; 7 function settime(obj) { 8 if (countdown == 0) { 9 obj.removeAttribute("disabled"); 10 obj.value="获取验证码"; 11 countdown = 60; 12 return; 13 } else { 14 obj.setAttribute("disabled", true); 15 obj.value="重新发送(" + countdown + ")"; 16 countdown--; 17 } 18 setTimeout(function() { 19 settime(obj) } 20 ,1000) 21 } 22 23 </script> 24 <body> 25 <input type="button" id="button1" value="获取验证码" onclick="settime(this)" /> 26 27 </body> 28 </html>