To make the images flexible, simply add max-width:100% and height:auto. Image max-width:100% and height:auto works in IE7, but not in IE8 (yes, another weird IE bug). To fix this, you need to add width:auto\9 for IE8.
img {
max-width: 100%;
height: auto;
width: auto\9; /* ie8 */
}
And if you want to enforce a fixed max width of the image, just place it inside a container, for example:
<div style=”max-width:500px;”>
<img src=”…” />
</div>
No javascript required. Works in latest versions of Chrome, Firefox and IE (which is all I’ve tested).
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