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/*!
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* Echo v1.3.0
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* Lazy-loading images with data-* attributes
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* Project: https://github.com/toddmotto/echo
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* by Todd Motto: http://toddmotto.com
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* Copyright. MIT licensed.
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*/
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window.Echo=function(a,b){"use strict";var c,d=function(c){var d=c.getBoundingClientRect();return(d.top>=0&&d.left>=0&&d.top)<=(a.innerHeight||b.documentElement.clientHeight)},e=function(){for(var a=0;a<c.length;a++){var b=c[a];d(b)&&(b.src=b.getAttribute("data-echo"),[].indexOf&&-1!==[].slice.call(c).indexOf(b)&&[].slice.call(c).splice(a,1))}},f=function(){c=b.querySelectorAll("[data-echo]"),e(),a.onscroll=e};return{init:f}}(window,document);
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