再次购买添加锚点

@@ -130,7 +130,17 @@ $cartnewSum.one('click', 'input[type="checkbox"]', function() {
     };
     choiceOut(dataJSON);
 });
-
+// 滚动到第一个选中的商品
+function scrollToFirst(){
+    var $selected = $('.pay-wapper tbody tr').find('.cart-item-check:checked');
+    var top = 0;
+    if($selected.length > 0){
+        $selected = $selected.eq(0);
+    }
+    top = $selected.offset().top - 50;
+    $('html,body').scrollTop(top);
+    return false;
+}
 function isCheck(obj, className) {
     selectArray = [];
     dataJSON = {};
@@ -880,4 +890,5 @@ $payWapper.on('selectstart', function() {
 });
 $goodsDetail.on('selectstart', function() {
     return false;
-});
\ No newline at end of file
+});    
+scrollToFirst();
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