select 下拉框的选中项的change事件

HTML文件<span style="float: left;">类&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;型:&nbsp;&nbsp;<select id="type" class="easyui-combobox" name="type" style="width: 90px;" data-options="required:false"><option value="1" selected="selected">安心帮卖</option><option value="2">同步拍</option></select></span><span style="float: right; margin-left: 66px;"><span id="auctionsFlag" style="display:none;">拍卖会场次:&nbsp;<select id="auctionId" class="easyui-combobox" name="auctionId" style="width: 244px;" data-options="required:false"><!-- <option value="" selected="selected">""</option> --></select></span><span id="aucTime">拍卖时间:&nbsp;&nbsp;<input type="text" id="startDate" style="width:110px;" class="easyui-datebox"/>&nbsp;&nbsp;至&nbsp;&nbsp;<input type="text" id="endDate" style="width:110px;" class="easyui-datebox"/></span></span>

JS文件var typeFlag = 0;$("#type").combobox({onChange: function (n,o) {if(n==1){hidden_change();}else{view_change();}}});function hidden_change(){typeFlag = 0;$("#auctionsFlag").css("display","none");$("#aucTime").css("display","block");}function view_change(){typeFlag = 1;$("#auctionsFlag").css("display","block");$("#aucTime").css("display","none");}

效果图: