/*
Lazy Load Plugin for jQuery
-------------------------------------------
Lazy loader is a jQuery plugin written in JavaScript. It delays loading of images in (long) web pages. Images outside of viewport (visible part of web page) wont be loaded before user scrolls to them.

HOW TO:
-------------------------------------------
<script type="text/javascript" charset="utf-8">
  $(function() {
	  $("img").lazyload();
  });
</script>

*/



(function($){$.fn.lazyload=function(options){var settings={threshold:0,failurelimit:0,event:"scroll",effect:"show",container:window};if(options){$.extend(settings,options);}
var elements=this;if("scroll"==settings.event){$(settings.container).bind("scroll",function(event){var counter=0;elements.each(function(){if($.abovethetop(this,settings)||$.leftofbegin(this,settings)){}else if(!$.belowthefold(this,settings)&&!$.rightoffold(this,settings)){$(this).trigger("appear");}else{if(counter++>settings.failurelimit){return false;}}});var temp=$.grep(elements,function(element){return!element.loaded;});elements=$(temp);});}
this.each(function(){var self=this;if(undefined==$(self).attr("original")){$(self).attr("original",$(self).attr("src"));}
if("scroll"!=settings.event||undefined==$(self).attr("src")||settings.placeholder==$(self).attr("src")||($.abovethetop(self,settings)||$.leftofbegin(self,settings)||$.belowthefold(self,settings)||$.rightoffold(self,settings))){if(settings.placeholder){$(self).attr("src",settings.placeholder);}else{$(self).removeAttr("src");}
self.loaded=false;}else{self.loaded=true;}
$(self).one("appear",function(){if(!this.loaded){$("<img />").bind("load",function(){$(self).hide().attr("src",$(self).attr("original"))
[settings.effect](settings.effectspeed);self.loaded=true;}).attr("src",$(self).attr("original"));};});if("scroll"!=settings.event){$(self).bind(settings.event,function(event){if(!self.loaded){$(self).trigger("appear");}});}});$(settings.container).trigger(settings.event);return this;};$.belowthefold=function(element,settings){if(settings.container===undefined||settings.container===window){var fold=$(window).height()+$(window).scrollTop();}else{var fold=$(settings.container).offset().top+$(settings.container).height();}
return fold<=$(element).offset().top-settings.threshold;};$.rightoffold=function(element,settings){if(settings.container===undefined||settings.container===window){var fold=$(window).width()+$(window).scrollLeft();}else{var fold=$(settings.container).offset().left+$(settings.container).width();}
return fold<=$(element).offset().left-settings.threshold;};$.abovethetop=function(element,settings){if(settings.container===undefined||settings.container===window){var fold=$(window).scrollTop();}else{var fold=$(settings.container).offset().top;}
return fold>=$(element).offset().top+settings.threshold+$(element).height();};$.leftofbegin=function(element,settings){if(settings.container===undefined||settings.container===window){var fold=$(window).scrollLeft();}else{var fold=$(settings.container).offset().left;}
return fold>=$(element).offset().left+settings.threshold+$(element).width();};$.extend($.expr[':'],{"below-the-fold":"$.belowthefold(a, {threshold : 0, container: window})","above-the-fold":"!$.belowthefold(a, {threshold : 0, container: window})","right-of-fold":"$.rightoffold(a, {threshold : 0, container: window})","left-of-fold":"!$.rightoffold(a, {threshold : 0, container: window})"});})(jQuery);