Images will normally be side by side horizontally so I don't know why you are having a problem. They are inline elements like text.
This code will make the images into links and show them side by side:-
<a href="page1.html"><img src="image1.png" alt="Image 1"></a>
<a href="page2.html"><img src="image2.png" alt="Image 2"></a>
<a href="page3.html"><img src="image3.png" alt="Image 3"></a>
Code downloaded to my PC will be deleted in due course.
WIN7; IE9, Firefox, Opera, Chrome and Safari for Windows; screen resolution usually 1366*768.
Also IE6 on W98 with 800*600 and IE8 on Vista 1440*900.