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copied!<p>You can set a flag on the image object when it loads and test that flag later:</p> <pre><code>var fname = getImgFnameFromDate(datetime); var imgAdd = new Image(); imgAdd.onload = function() { this.myLoadFlag = true; } imgAdd.src = fname; imgStore.push(imgAdd); </code></pre> <p>Then elsewhere, you can check to see if the image has been loaded yet:</p> <pre><code>if (imgStore[imgIndex].myLoadFlag) { // image has been loaded } </code></pre> <p>When using an onload handler, just make sure that you set it before you set the <code>.src</code> property otherwise, there are some cases in some browsers where you will miss the onload event if the image is already in the browser cache.</p> <hr> <p>An alternate approach (perhaps simpler to use) would be to have a second array that only contains loaded images and your main code only uses that:</p> <pre><code>// place we first put images, they go into imgStore only when actually loaded var imgPending = []; var fname = getImgFnameFromDate(datetime); var imgAdd = new Image(); imgAdd.onload = function() { imgStore.push(imgAdd); // now that it's loaded, add it to the images we're using } imgAdd.src = fname; imgPending.push(imgAdd); </code></pre> <p>Then, your code that uses <code>imgStore</code> will only ever see images that are actually loaded. One downside to this is that images go into <code>imgStore</code> in load order, not necessarily in the order that you request them so the order this way could be different than your old way.</p>

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