You're going to need to place the images inside of a div
and then style the div
's background with the desired gradient. For example:
HTML
<div id="gradient">
<img src="..." /><img src="..." /><img src="..." />
</div>
CSS
#gradient {
width: 300px; //Whatever the total width of the images is
height: 61px; //Whatever the height of the images is
... //Gradient CSS goes here
}
Here is a fiddle showing it in action: http://jsfiddle.net/2aHHu/