var HurYuiUtil={LazyLoadImage:{imageLoaderClass:'hurLazyImage',lookAhead:300,timeOutId:0,handlers:[],timeOutId:0,onScrollDelay:100,onScrollDelayIE:100,_onScrollDelay:0,addHandler:function(fn){var il=HurYuiUtil.LazyLoadImage;var l=il.handlers.length;il.handlers[l]=fn;if(!il._onScrollDelay){if(YAHOO.util.Event.isIE){il._onScrollDelay=il.onScrollDelayIE;}else il._onScrollDelay=il.onScrollDelay;}},myHandlerOnScroll:function(){var il=HurYuiUtil.LazyLoadImage;if(il.timeOutId){clearTimeout(il.timeOutId);}il.timeOutId=setTimeout(il.myHandler,il._onScrollDelay);},myHandler:function(){var il=HurYuiUtil.LazyLoadImage;for(var i=0,l=il.handlers.length;i<l;i++){il.handlers[i]();}},getView:function(refresh){if(!this.view||refresh){this.view={};this.view.top=self.pageYOffset||(document.documentElement&&document.documentElement.scrollTop)||(document.body&&document.body.scrollTop);this.view.height=YAHOO.util.Dom.getViewportHeight();this.view.limit=this.view.top+this.view.height+400;if(!refresh){this.addHandler(function(){HurYuiUtil.LazyLoadImage.getView(1)});YAHOO.util.Event.addListener(window,"resize",HurYuiUtil.LazyLoadImage.myHandlerOnScroll);YAHOO.util.Event.addListener(window,"scroll",HurYuiUtil.LazyLoadImage.myHandlerOnScroll);}}},checkImages:function(container_id,check_if_visible_element,add_dimensions){this.getView();var group={};group.id=container_id;group.imgs=YAHOO.util.Dom.getElementsByClassName(HurYuiUtil.LazyLoadImage.imageLoaderClass,'IMG',container_id);group.count=group.imgs?group.imgs.length:0;group.count_left=group.count;this.addHandler(function(){HurYuiUtil.LazyLoadImage.load(group,check_if_visible_element,add_dimensions)});this.load(group,check_if_visible_element,add_dimensions);},load:function(group,check_if_visible_element,add_dimensions){if(group.count_left<=0||!group.imgs){return true;}if(check_if_visible_element){var parent_region=YAHOO.util.Dom.getRegion(group.id);if(undefined==add_dimensions)add_dimensions=[0,0];parent_region.left+=add_dimensions[0]<0?add_dimensions[0]:0;
parent_region.right+=add_dimensions[0]>0?add_dimensions[0]:0;parent_region.top+=add_dimensions[1]<0?add_dimensions[1]:0;parent_region.bottom+=add_dimensions[1]>0?add_dimensions[1]:0;var img_region=null,intersects=null;}for(var i=0,elPos=0;i<group.count;i++){ if(!group.imgs[i])continue;elPos=YAHOO.util.Dom.getY(group.imgs[i]);if(elPos<=this.view.limit){if(check_if_visible_element){img_region=YAHOO.util.Region.getRegion(group.imgs[i]);intersects=parent_region.contains(img_region);if(!intersects){continue;}}this.getOriginalPath(group.imgs[i]);YAHOO.util.Dom.removeClass(group.imgs[i],'hurLazyImage');group.imgs[i]=null;group.count_left--;}}},getOriginalPath:function(el){if(el&&el.longDesc){el.src=el.longDesc;}}}}