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    <pre><code>// // here's more elaborate, and user friendly, version // works the same as previous, // I've just added the possibility to subscribe funcions // for load/error/abort/done events separately, // and pass images as image array with the hash map of options to the funcion, // and some cleanup code to remove unnecesary function handlers // after download is done. // // use: // // cacheimages( // { // imgs : [ // 'http://upload.wikimedia.org/wikipedia/commons/thumb/2/2f/Flag_of_the_United_Nations.svg/2000px-Flag_of_the_United_Nations.svg.png', // 'http://upload.wikimedia.org/wikipedia/commons/e/e5/IBM_Port-A-Punch.jpg', // 'http://upload.wikimedia.org/wikipedia/commons/7/7e/Tim_Berners-Lee_CP_2.jpg', // 'http://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/NewTux.svg/2000px-NewTux.svg.png', // 'http://upload.wikimedia.org/wikipedia/commons/4/4c/Beekeeper_keeping_bees.jpg', // 'http://upload.wikimedia.org/wikipedia/commons/9/9a/100607-F-1234S-004.jpg' // ], // // load : function () { console.log( arguments, this ); }, // # triggered when single image is sucessfuly cached // # @param1, ( string ), loaded image source path // # @param2, ( event object ), native event object generated // # context ( this ), Image object, target obj related with event // // error : function () { console.log( arguments, this ); }, // # triggered when error occured when tring to download image // # @param1, ( string ), path to the image failed to load // # @param2, ( event object ), native event object describing the circumstance // # context ( this ), Image object, target obj related with event // // abort : function () { console.log( arguments, this ); }, // # triggered when download is haulted by user action ( browsers 'stop' button ) // # @param1, ( string ), path to the image failed to load // # @param2, ( event object ), native event object generated // # context ( this ), Image object, target obj related with event // // done : function () { console.log( arguments, this ); } // # triggered after download proccess completes // # @params, ( string(s) ), images in question // # context ( this ), document // } // ); // ;(( function ( methodName, dfn ) { // add "cacheimages" function identifier to target context ( window ) this[methodName] = dfn(); } ).call( self, "cacheimages", function () { var emptyfn = function () {}; var isfn = function ( o ) { return typeof o === "function"; }; var isplainobj = function ( o ) { return Object.prototype.toString.call( o ) === "[object Object]"; }; var isarray = function ( o ) { return Object.prototype.toString.call( o ) === "[object Array]"; }; var defaults = { load : emptyfn, error : emptyfn, abort : emptyfn, done : emptyfn }; var imgreg = /\.(?:jpe?g|jpe|png|gif|bmp|tiff?|tga|iff)$/i; var events = ["onload", ,"onerror" ,"onabort"]; var _F = function ( settup ) { if ( isplainobj( settup ) &amp;&amp; ( isarray( settup.imgs ) &amp;&amp; ( settup.imgs.length &gt; 0 ) ) ) { var pics = []; var n = 0; var opts = { load : isfn( settup.load ) ? settup.load : defaults.load, error : isfn( settup.error ) ? settup.error : defaults.error, abort : isfn( settup.abort ) ? settup.abort : defaults.abort, done : isfn( settup.done ) ? settup.done : defaults.done, imgs : settup.imgs.filter( function ( imgstr ) { return imgreg.test( String( imgstr ) ); } ) }; var loadhandler; if ( opts.imgs.length == 0 ) { opts.done.call( document ); return []; } loadhandler = function ( e ) { e || ( e = window.event ); n += 1; if ( n &lt; opts.imgs.length ) { opts[ e.type ].call( this, this.src, e ); // console &amp;&amp; console.log( e.type, ' --&gt; [ ', this.src, ' ].' ); } else { opts.done.apply( document, opts.imgs ); pics.forEach( function ( imgobj ) { events.forEach( function ( vnt ) { imgobj[vnt] = null; } ); } ); } }; opts.imgs.forEach( function ( imgstr, i ) { pics[i] = new Image; events.forEach( function ( vnt ) { pics[i][vnt] = loadhandler; } ); pics[i].src = imgstr; } ); return opts.imgs.concat(); } else { return false; } }; return _F; } )); // </code></pre>
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