code: function () {
              var _this = this;
  
              /* 滚动拉取图片 */
              domUtils.on($G('imageList'), 'scroll', function(e){
                  var panel = this;
                  if (panel.scrollHeight - (panel.offsetHeight + panel.scrollTop) < 10) {
                      _this.getImageData();
                  }
              });
              /* 选中图片 */
              domUtils.on(this.container, 'click', function (e) {
                  var target = e.target || e.srcElement,
                      li = target.parentNode,
                      nodes = $G('imageListUl').childNodes;
  
                  if (li.tagName.toLowerCase() == 'li') {
                      updateFormState('nocolor', null, '');
                      for (var i = 0, node; node = nodes[i++];) {
                          if (node == li && !domUtils.hasClass(node, 'selected')) {
                              domUtils.addClass(node, 'selected');
                              updateFormState('colored', null, li.firstChild.getAttribute("_src"), 'repeat');
                          } else {
                              domUtils.removeClasses(node, 'selected');
                          }
                      }
                      updateBackground();
                  }
              });
          }
docs: /* 初始化滚动事件,滚动到地步自动拉取数据