update for make the recommend-for-you be sent after scroll. code review by LZF

@@ -10,9 +10,20 @@ var Swiper = require('yoho.iswiper'),
 
 var recommendSwiper,
     $recommendForYou = $('.recommend-for-you'),
-    preferenceUrl = $('#preferenceUrl').val();
+    preferenceUrl = $('#preferenceUrl').val(),
+    winH = $(window).height(),
+    end = false,
+    requesting = false;
 
-if (preferenceUrl) {
+
+function request() {
+    if (requesting || end) {
+        return;
+    }
+
+    requesting = true;
+
+    if (preferenceUrl) {
         $.get(preferenceUrl).then(function(html) {
             if (html.length < 5) {
                 $recommendForYou.css('display', 'none');
@@ -29,9 +40,17 @@ if (preferenceUrl) {
                 }
             }
 
-        window.rePosFooter();
+        requesting = false;
+        end = true;
 
         }).fail(function() {
             $recommendForYou.hide();
         });
+    }
 }
+
+$(window).scroll(function() {
+    if (!end || $(window).scrollTop() + winH >= $(document).height() - 50) {
+        request();
+    }
+});