停车记录查询，切换车场时清除时间条件，按默认条件查询

pages/parking/parkinglog.vue

@@ -277,6 +277,9 @@
 			},
 			changePark(val){
 				//console.log(val)
+				//切换停车场时，清空之前的时间条件
+				this.filter.startDate=null;
+				this.filter.endDate=null;
 				this.loadPageData(this.getLoadParams(1),false,"in");
 				this.loadPageData(this.getLoadParams(1),false,"off");
 				this.loadMarked(this.getLoadParams(1),false)