避免页面按钮重复提交

 1         function preventAjax(obj,num){

 2             obj.disabled = true;

 3             var num = num;

 4             var types =obj.type;

 5             if(types == ‘submit‘){

 6                 var text = obj.value;

 7                 var time1 = setInterval(function(){

 8                     obj.value = num;

 9                     num--;

10                     if(obj.value <= 0 ){

11                         clearInterval(time1);

12                         obj.disabled = false;

13                         obj.value = text;

14                     }

15                 },1000);

16             }else{

17                 var text = obj.innerHTML

18                 var time1 = setInterval(function(){

19                     obj.innerHTML = num;

20                     num--;

21                     if(obj.innerHTML <= 0 ){

22                         clearInterval(time1);

23                         obj.disabled = false;

24                         obj.innerHTML = text;

25                     }

26                 },1000);

27             }

28         }

绑定事件即可调用：