fix bug

apps/home/Tpl/default/Home/exams_w3g.html

@@ -44,7 +44,10 @@
 						</div>
 						<div class="class_right layout_center">
 							<div @click="startDo(item)" v-if="item.price == 0 || item.is_buy" class="button_green layout_center">开始做题</div>
+							<!--
 							<div @click="onPay(item)" v-else-if="item.price > 0" class="button_orange layout_center">¥{{item.price}}</div>
+							-->
+							<div @click="startDo(item)" v-else-if="item.price > 0" class="button_orange layout_center">预览</div>
 						</div>
 					</div>
 					<span style="margin-top: 35vh;" v-if="zhenti.length == 0" class="text_14_400 color_999999 self_center">没有找到！</span>
@@ -88,7 +91,10 @@
 						</div>
 						<div class="class_right layout_center">
 							<div v-if="item.price == 0|| item.is_buy"  @click="onDownload(item)"  class="button_green layout_center">下载试题</div>
+							<!--
 							<div @click="onPay(item)" v-else-if="item.price > 0" class="button_orange layout_center">¥{{item.price}}</div>
+							-->
+							<div @click="onDownload(item)" v-else-if="item.price > 0" class="button_orange layout_center">下载预览试题</div>
 						</div>
 					</div>
 					<span style="margin-top: 35vh;" v-if="download.length == 0" class="text_14_400 color_999999 self_center">没有找到！</span>
@@ -230,7 +236,7 @@
 			onChange: function(tab) {
         console.log(tab)
         switch(tab){
-          case 0: 
+          case 0:
             window.location.href = "{:U('classroom/Index/index')}"
             break;
           case 1: