!function(t){t.fn.isOnScreen=function(o,e){(null==o||"undefined"==typeof o)&&(o=1),(null==e||"undefined"==typeof e)&&(e=1);var i=t(window),r={top:i.scrollTop(),left:i.scrollLeft()};r.right=r.left+i.width(),r.bottom=r.top+i.height();var f=this.outerHeight(),n=this.outerWidth();if(!n||!f)return!1;var h=this.offset();h.right=h.left+n,h.bottom=h.top+f;var l=!(r.righth.right||r.bottomh.bottom);if(!l)return!1;var m={top:Math.min(1,(h.bottom-r.top)/f),bottom:Math.min(1,(r.bottom-h.top)/f),left:Math.min(1,(h.right-r.left)/n),right:Math.min(1,(r.right-h.left)/n)};return m.left*m.right>=o&&m.top*m.bottom>=e}}(jQuery);