switch的用法

var cangWei=parseInt($(‘.tickets-first .selected‘).attr(‘data-level‘));

switch(cangWei){
          case ‘3‘:
         //代码1
          break;
          case ‘4‘:
         //代码2
          break;
          default:
          //代码3  
 }

var cost = checkedInfo.jipiaoInfo.lowestCost;
switch (cost) {
        case 0:
         break;
                            case 1:
                                $(‘.tickets-sec .items-box‘).eq(1).addClass(‘selected‘).find(‘.corner‘).show();
                                break;
                            case 2:
                                $(‘.tickets-sec .items-box‘).eq(2).addClass(‘selected‘).find(‘.corner‘).show();
                                break;
                        }