fix bug

apps/course/Tpl/default/Video/index_w3g.html

@@ -189,11 +189,17 @@
 			onLoad: function() {
 				let that = this
 				let on = "{$marketConf['order_switch']}" == 1
+
+				let lower = '';
+				if (this.minPrice || this.maxPrice) {
+					lower = this.minPrice + ',' + this.maxPrice;
+				}
+
 				$.ajax({
 					type: "GET",
 					url: "{:U('course/Video/index')}",
 					data: "api=1&p=" + (this.page + 1) +
-						"&orderBy=&cateId=" + this.cate + "&vtype=1&charge=&videofile=&eaxm_id=&lower=" + this.minPrice + ',' + this.maxPrice + "&mhm_id="+MID+"&best=&vip_id=",
+						"&orderBy=&cateId=" + this.cate + "&vtype=1&charge=&videofile=&eaxm_id=&lower=" + lower + "&mhm_id="+MID+"&best=&vip_id=",
 					dataType: "json",
 					success: function(data) {
 						that.loading =false