I'm sorry -- you saw one of what?
Providing a link to what you're referring to would help.
If you mean a photo gallery window that scrolls left to right -- you might try using a div element with a scrollbar to make your window, and place the picture thumbnails inside of that.
If my example below is not what you had in mind, please clarify.
<html>
<head>
<style type="text/css">
body {
text-align: center; /* IE page centering */
background: silver; /* contrast */
}
#viewport {
width: 200px; /* viewport width */
height: 140px; /* viewport heigth */
overflow: auto; /* scrollbars */
background: white; /* contrast */
white-space: nowrap; /* image flow not stack */
/* could use float: left or other approach */
margin: 0 auto; /* Mozilla page centering */
text-align: left; /* IE centering fix */
}
#viewport img {
height: 110px; /* max height scaling of images */
border-width: 0; /* remove a link border on images */
}
</style>
</head>
<body>
<div id="viewport">
<a href="#"><img src="http://g-ecx.images-amazon.com/images/G/01/apparel/gateway/B0013YWXZM._V255323983_.jpg" /></a>
<a href="#"><img src="http://g-ecx.images-amazon.com/images/G/01/apparel/gateway/B0013YWXZM._V255323983_.jpg" /></a>
<a href="#"><img src="http://g-ecx.images-amazon.com/images/G/01/apparel/gateway/B0013YWXZM._V255323983_.jpg" /></a>
<a href="#"><img src="http://g-ecx.images-amazon.com/images/G/01/apparel/gateway/B0013YWXZM._V255323983_.jpg" /></a>
</div>
</body>
</html>
