$k.confirm({
      content:'自定義按鈕',
      buttons:[
            {text:'按鈕一',onClick:function(args){
                   $k.alert({content:'onClick事件：您點選了“按鈕一”'});
            }},
            {text:'按鈕二',onClick:function(args){
                   $k.alert({content:'onClick事件：您點選了“按鈕二”'});
            },close:'first'}, //close:'first'：先觸發onClick事件，再觸發onClosed事件.
 

            {text:'按鈕三',onClick:function(args){
                   $k.alert({content:'onClick事件：您點選了“按鈕三”'});
            }},
            {text:'按鈕四',onClick:function(args){
                   $k.alert({content:'onClick事件：您點選了“按鈕四”'});
            }}
       ],
      onClosed:function(args){
          if (args.closeTrigger == 'btn-0') {
              $k.alert({content:'onClosed事件：您點選了“按鈕一”'});
          }
          else if(args.closeTrigger == 'btn-1'){
              $k.alert({content:'onClosed事件：您點選了“按鈕二”'});
          }
          else if(args.closeTrigger == 'btn-2'){
              $k.alert({content:'onClosed事件：您點選了“按鈕三”'});
          }
          else if(args.closeTrigger == 'btn-3'){
              $k.alert({content:'onClosed事件：您點選了“按鈕四”'});
          }
      }
});