Added IE8 support, hooray!

README.md

@@ -1,6 +1,6 @@
 # Echo [![Build Status](https://travis-ci.org/toddmotto/echo.png)](https://travis-ci.org/toddmotto/echo)
 
-Echo is a standalone JavaScript lazy-loading image tool. Echo is fast, less than 1KB and uses HTML5 data-* attributes.
+Echo is a standalone JavaScript lazy-loading image tool. Echo is fast, less than 1KB and uses HTML5 data-* attributes. Echo works in IE8+.
 
 ```html
 <img src="img/blank.gif" alt="Photo" data-echo="img/photo.jpg">

dist/echo.js

@@ -21,7 +21,7 @@ window.Echo = (function (window, document, undefined) {
       var self = store[i];
       if (_inView(self)) {
         self.src = self.getAttribute('data-echo');
-        if (store.indexOf(self) !== -1) {
+        if ([].indexOf && store.indexOf(self) !== -1) {
           store.splice(i, 1);
         }
       }
@@ -29,7 +29,7 @@ window.Echo = (function (window, document, undefined) {
   };
 
   var init = function () {
-    store = [].slice.call(document.querySelectorAll('[data-echo]'));
+    store = document.querySelectorAll('[data-echo]');
     _pollImages();
     window.onscroll = _pollImages;
   };

dist/echo.min.js

@@ -5,4 +5,4 @@
  *  by Todd Motto: http://toddmotto.com
  *  Copyright. MIT licensed.
  */
-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"),-1!==c.indexOf(b)&&c.splice(a,1))}},f=function(){c=[].slice.call(b.querySelectorAll("[data-echo]")),e(),a.onscroll=e};return{init:f}}(window,document);
+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!==c.indexOf(b)&&c.splice(a,1))}},f=function(){c=b.querySelectorAll("[data-echo]"),e(),a.onscroll=e};return{init:f}}(window,document);

src/echo.js

@@ -14,7 +14,7 @@ window.Echo = (function (window, document, undefined) {
       var self = store[i];
       if (_inView(self)) {
         self.src = self.getAttribute('data-echo');
-        if (store.indexOf(self) !== -1) {
+        if ([].indexOf && store.indexOf(self) !== -1) {
           store.splice(i, 1);
         }
       }
@@ -22,7 +22,7 @@ window.Echo = (function (window, document, undefined) {
   };
 
   var init = function () {
-    store = [].slice.call(document.querySelectorAll('[data-echo]'));
+    store = document.querySelectorAll('[data-echo]');
     _pollImages();
     window.onscroll = _pollImages;
   };