| 31 | } |
| 32 | |
| 33 | function loadScript( url, callback ) { |
| 34 | |
| 35 | var head = document.querySelector( 'head' ); |
| 36 | var script = document.createElement( 'script' ); |
| 37 | script.type = 'text/javascript'; |
| 38 | script.src = url; |
| 39 | |
| 40 | // Wrapper for callback to make sure it only fires once |
| 41 | var finish = function() { |
| 42 | if( typeof callback === 'function' ) { |
| 43 | callback.call(); |
| 44 | callback = null; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | script.onload = finish; |
| 49 | |
| 50 | // IE |
| 51 | script.onreadystatechange = function() { |
| 52 | if ( this.readyState === 'loaded' ) { |
| 53 | finish(); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | // Normal browsers |
| 58 | head.appendChild( script ); |
| 59 | |
| 60 | } |
| 61 | |
| 62 | return { |
| 63 | init: function() { |