jquery.inview.min.js

(function(d){var p={},e,a,h=document,i=window,f=h.documentElement,j=d.expando;d.event.special.inview={add:function(a){p[a.guid+"-"+this[j]]={data:a,$element:d(this)}},remove:function(a){try{delete p[a.guid+"-"+this[j]]}catch(d){}}};d(i).bind("scroll resize",function(){e=a=null});!f.addEventListener&&f.attachEvent&&f.attachEvent("onfocusin",function(){a=null});setInterval(function(){var k=d(),j,n=0;d.each(p,function(a,b){var c=b.data.selector,d=b.$element;k=k.add(c?d.find(c):d)});if(j=k.length){var b;
if(!(b=e)){var g={height:i.innerHeight,width:i.innerWidth};if(!g.height&&((b=h.compatMode)||!d.support.boxModel))b="CSS1Compat"===b?f:h.body,g={height:b.clientHeight,width:b.clientWidth};b=g}e=b;for(a=a||{top:i.pageYOffset||f.scrollTop||h.body.scrollTop,left:i.pageXOffset||f.scrollLeft||h.body.scrollLeft};n<j;n++)if(d.contains(f,k[n])){b=d(k[n]);var l=b.height(),m=b.width(),c=b.offset(),g=b.data("inview");if(!a||!e)break;c.top+l>a.top&&c.top<a.top+e.height&&c.left+m>a.left&&c.left<a.left+e.width?
(m=a.left>c.left?"right":a.left+e.width<c.left+m?"left":"both",l=a.top>c.top?"bottom":a.top+e.height<c.top+l?"top":"both",c=m+"-"+l,(!g||g!==c)&&b.data("inview",c).trigger("inview",[!0,m,l])):g&&b.data("inview",!1).trigger("inview",[!1])}}},250)})(jQuery);