关于js的keyCode

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event.code = event.which || event.keyCode;

event.key = String.fromCharCode(code).toLowerCase();

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// 价格字符串格式（小数点后最多两位）

$$(‘.jsForPrice‘).addEvents({

     ‘keypress‘: function(ev){

          var result;

          if(this.val().length === 0 || this.val().test(‘\\.‘)){// 只能有1个点号

               result = ev.code>=48&&ev.code<=57 || ev.code==8;

          }else{

               result = ev.code>=48&&ev.code<=57||ev.code==8||ev.code==46;

          }

          return result;

     },

     ‘keyup‘: function(ev){

          if(this.val().test(‘\\.‘)){

               if(this.val().split(‘.‘)[1].length>2){

                    this.val(this.val().substring(0, this.val().length-1))

               }

          }

          //console.log(this.val().test(‘^[0-9]+(\\.[0-9]{1,2}){0,1}$‘))

     }

});