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copied!<p>From: <a href="http://web.archive.org/web/20120904060007/http://lucassmith.name/2008/11/is-my-image-loaded.html" rel="nofollow noreferrer">http://lucassmith.name/2008/11/is-my-image-loaded.html</a></p> <pre><code>// First a couple helper functions function $(id) { return !id || id.nodeType === 1 ? id : document.getElementById(id); } function isType(o,t) { return (typeof o).indexOf(t.charAt(0).toLowerCase()) === 0;} // Here's the meat and potatoes function image(src,cfg) { var img, prop, target; cfg = cfg || (isType(src,'o') ? src : {}); img = $(src); if (img) { src = cfg.src || img.src; } else { img = document.createElement('img'); src = src || cfg.src; } if (!src) { return null; } prop = isType(img.naturalWidth,'u') ? 'width' : 'naturalWidth'; img.alt = cfg.alt || img.alt; // Add the image and insert if requested (must be on DOM to load or // pull from cache) img.src = src; target = $(cfg.target); if (target) { target.insertBefore(img, $(cfg.insertBefore) || null); } // Loaded? if (img.complete) { if (img[prop]) { if (isType(cfg.success,'f')) { cfg.success.call(img); } } else { if (isType(cfg.failure,'f')) { cfg.failure.call(img); } } } else { if (isType(cfg.success,'f')) { img.onload = cfg.success; } if (isType(cfg.failure,'f')) { img.onerror = cfg.failure; } } return img; } </code></pre> <p>And here how to use it:</p> <pre><code>image('imgId',{ success : function () { alert(this.width); }, failure : function () { alert('Damn your eyes!'); }, }); image('http://somedomain.com/image/typooed_url.jpg', { success : function () {...}, failure : function () {...}, target : 'myContainerId', insertBefore : 'someChildOfmyContainerId' }); </code></pre>

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