javascript实现避免页面按钮重复提交

很多时候我们都需要防止重复提交,这方面的文章也比较多,实现的途径差别也很大.因为有些时候即使服务器能够识别重复的提交,也会造成问题.比如需要很长等待时间的操作,在首次提交后,不断重复提交,页面可能会死掉.用脚本来控制的话可以防止这种问题.

 function preventAjax(obj,num){
             obj.disabled = true;
             var num = num;
             var types =obj.type;
             if(types == 'submit'){
                 var text = obj.value;
                 var time1 = setInterval(function(){
                     obj.value = num;
                     num--;
                     if(obj.value <= 0 ){
                         clearInterval(time1);
                         obj.disabled = false;
                         obj.value = text;
                     }
                 },1000);
             }else{
                 var text = obj.innerHTML
                 var time1 = setInterval(function(){
                     obj.innerHTML = num;
                     num--;
                     if(obj.innerHTML <= 0 ){
                         clearInterval(time1);
                         obj.disabled = false;
                         obj.innerHTML = text;
                     }
                 },1000);
             }
         }