* [html5] fix slider's lazyload.
* [html5] fix slider's lazyload.

alibaba/weex,acton393/incubator-weex,erha19/incubator-weex,alibaba/weex,yuguitao/incubator-weex,dianwodaMobile/DWeex,MrRaindrop/incubator-weex,KalicyZhou/incubator-weex,dianwodaMobile/DWeex,xiayun200825/weex,alibaba/weex,xiayun200825/weex,erha19/incubator-weex,weexteam/incubator-weex,KalicyZhou/incubator-weex,alibaba/weex,weexteam/incubator-weex,leoward/incubator-weex,erha19/incubator-weex,KalicyZhou/incubator-weex,leoward/incubator-weex,MrRaindrop/incubator-weex,yuguitao/incubator-weex,acton393/incubator-weex,cxfeng1/incubator-weex,xiayun200825/weex,Hanks10100/incubator-weex,acton393/incubator-weex,Hanks10100/incubator-weex,cxfeng1/incubator-weex,miomin/incubator-weex,erha19/incubator-weex,cxfeng1/incubator-weex,erha19/incubator-weex,dianwodaMobile/DWeex,miomin/incubator-weex,leoward/incubator-weex,weexteam/incubator-weex,yuguitao/incubator-weex,acton393/incubator-weex,miomin/incubator-weex,Hanks10100/incubator-weex,miomin/incubator-weex,xiayun200825/weex,KalicyZhou/incubator-weex,KalicyZhou/incubator-weex,yuguitao/incubator-weex,alibaba/weex,cxfeng1/incubator-weex,alibaba/weex,cxfeng1/incubator-weex,alibaba/weex,miomin/incubator-weex,erha19/incubator-weex,xiayun200825/weex,dianwodaMobile/DWeex,MrRaindrop/incubator-weex,xiayun200825/weex,MrRaindrop/incubator-weex,dianwodaMobile/DWeex,miomin/incubator-weex,acton393/incubator-weex,MrRaindrop/incubator-weex,miomin/incubator-weex,Hanks10100/incubator-weex,yuguitao/incubator-weex,dianwodaMobile/DWeex,miomin/incubator-weex,MrRaindrop/incubator-weex,weexteam/incubator-weex,erha19/incubator-weex,leoward/incubator-weex,weexteam/incubator-weex,Hanks10100/incubator-weex,KalicyZhou/incubator-weex,leoward/incubator-weex,Hanks10100/incubator-weex,acton393/incubator-weex,erha19/incubator-weex,leoward/incubator-weex,yuguitao/incubator-weex,cxfeng1/incubator-weex,Hanks10100/incubator-weex,Hanks10100/incubator-weex,acton393/incubator-weex,acton393/incubator-weex,weexteam/incubator-weex