优化tag页lazyload

@@ -63,6 +63,22 @@ exports.init = function() {
             Mustache.parse(tpl);
         });
         
+        //img-lazyload
+        function lazyLoad(imgs) {
+            var $imgs;
+            if (typeof imgs === 'undefined') {
+                $imgs = $('img.lazy');
+            } else {
+                $imgs = imgs;
+            }
+            $imgs.lazyload({
+                effect : 'fadeIn',
+                effect_speed: 10,
+                placeholder: 'data:image/gif;base64,R0lGODlhAQABAJEAAAAAAP///93d3f///yH5BAEAAAMALAAAAAABAAEAAAICVAEAOw=='
+            });
+        }
+        lazyLoad();
+                        
         //相关文章截取文字
         ellipsis.init();
         $('.tag-text, .tag-title').each(function() {
@@ -106,7 +122,8 @@ exports.init = function() {
          * 加载更多
          */
         function loadMore() {
-            var setting;
+            var setting,
+                hasNum = $tagList.find('.tag-content').length;
             
             if (hasAuthor) {
                 setting = {
@@ -148,13 +165,8 @@ exports.init = function() {
                     }
                     if (html !== '') {
                         $tagList.append(html);
-                    
-                        //lazyload 不包含src即未加载的图片
-                        $('img.lazy').lazyload({
-                            effect : 'fadeIn',
-                            container: $tagList,
-                            placeholder: 'data:image/gif;base64,R0lGODlhAQABAJEAAAAAAP///93d3f///yH5BAEAAAMALAAAAAABAAEAAAICVAEAOw=='
-                        });
+                        //lazyload新加载的项
+                        lazyLoad($tagList.find('.tag-content:gt(' + (hasNum - 1) + ') img.lazy'));
                         //文字截取
                         $tagList.find('.tag-text, .tag-title').each(function() {
                             this.mlellipsis(2);