判断高度为文章高度

@@ -14,16 +14,17 @@ var $nav = $('.category-nav'),
 
 require('../common');
 
-(function() {
+function resetHeight() {
     var $header = $('.yoho-header'),
         $search = $('#search-input');
 
-    var h = $(window).height() - $header.outerHeight() - $search.outerHeight() - $nav.outerHeight();
+    var h = document.body.scrollHeight - $header.outerHeight() - $search.outerHeight() - $nav.outerHeight();
 
     $categoryContainer.css('min-height', h);
 
     $contents.height(h);
-}());
+}
+resetHeight();
 
 $('#search-input').focus(function() {
     $(this).blur();
@@ -39,6 +40,7 @@ $nav.on('touchend touchcancel', function(e) {
     var $this = $(e.target).closest('li'),
         selector = '.' + $this.data('channel');
 
+    resetHeight();
     if ($this.hasClass('focus')) {
         return;
     }