Learning JS, gallery won't work

Hi everyone!

Thanks in advance for any help with this. I'm learning JS right now (I usually deal with php) and I think I'm getting the hang of it. The only problem is that I used a script out of the book I'm learning it from to see if I could get it right, and the script doesn't work. Of course, since I'm just learning, I can't really debug it too much... anyone have any ideas?

window.onload = initLinks; var galleryPix = new Array ("images/galleries/40th/kennedy_wave.jpg","images/galleries/40th/kennedy_forum_view.jpg","images/galleries/40th/berke_students.jpg","images/galleries/40th/breakout1.jpg","images/galleries/40th/berke.jpg","images/galleries/40th/caroline.jpg","images/galleries/40th/young_leaders.jpg","images/galleries/40th/clapping.jpg","images/galleries/40th/unknown5.jpg","images/galleries/40th/ellwood.jpg","images/galleries/40th/unknown4.jpg","images/galleries/40th/felz_ifill.jpg","images/galleries/40th/unknown3.jpg","images/galleries/40th/shaheen_table.jpg","images/galleries/40th/unknown2.jpg","images/galleries/40th/unknown.jpg","images/galleries/40th/futurist_panel2.jpg","images/galleries/40th/futurists_panel.jpg","images/galleries/40th/glickman.jpg","images/galleries/40th/students3.jpg","images/galleries/40th/hicks.jpg","images/galleries/40th/students2.jpg","images/galleries/40th/ifill.jpg","images/galleries/40th/students.jpg","images/galleries/40th/felzenberg.jpg","images/galleries/40th/journalism_panel.jpg","images/galleries/40th/stefanik.jpg","images/galleries/40th/kennedy_forum_view.jpg","images/galleries/40th/kennedy_woodruff.jpg"); var thisPic = 0; function initLinks() { document.getElementById("prevLink").onclick = processPrevious; document.getElementById("nextLink").onclick = processNext; } function processPrevious() { if (thisPic == 0) { thisPic = galleryPix.length; } thisPic--; document.getElementById("galleryPic").src = galleryPix[thisPic]; return false; } function processNext() { thisPic++; if (thisPic == galleryPix.length) { thisPic = 0; } document.getElementById("galleryPic").src = galleryPix[thisPic]; return false; } in the header, then this in the body: <table summary="photo gallery display" width="100%"> <tr> <td colspan="2" align="center"><span class="section_subhead">40th Anniversary Photo Gallery</span></td> </tr> <tr><td><p><a href="previous.html" style"float: left;" id="prevLink">< PREVIOUS </a> <a href="next.html" style="float:right;" align="right" id="nextLink">NEXT ></a></p></td></tr>; <tr> <td colspan="2" align="center"><img src="images/galleries/40th/kennedy_wave.jpg" alt="gallery" id="galleryPic" /> </td> </tr> </table>