I have done the first two links
function Link(id,c) {
document.getElementById(id).style.color=c;
}
<div id="project_links">
<h2><a href="../architecture_projects/confluence.html" onmouseover="MM_swapImage('confluence','','http://www.colinostman.com/project_directory/architecture_images/confluence2.jpg',1);Link('lk1','red');" onmouseout="MM_swapImgRestore();Link('lk1','black');" id="lk1">CONFLUENCE</a></h2>
<h2><a href="../architecture_projects/confluence sculpture.html" onmouseover="MM_swapImage('sculpture','','http://www.colinostman.com/project_directory/architecture_images/sculpture2.jpg',1);Link('lk2','red');" onmouseout="MM_swapImgRestore();Link('lk2','black');" id="lk2">CONFLUENCE SCULPTURE</a></h2>
</div>
<div id="image" >
<div id="column1">
<a href="../architecture_projects/confluence.html" onmouseout="MM_swapImgRestore();Link('lk1','black');" onmouseover="MM_swapImage('confluence','','http://www.colinostman.com/project_directory/architecture_images/confluence2.jpg',1);Link('lk1','red');"><img src="http://www.colinostman.com/project_directory/architecture_images/confluence1.jpg" alt="confluence" name="confluence" width="165" height="165" border="0" id="confluence" /></a>
<a href="../architecture_projects/immersion.html" onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('immersion','','http://www.colinostman.com/project_directory/architecture_images/immersion2.jpg',1)"><img src="http://www.colinostman.com/project_directory/architecture_images/immersion1.jpg" alt="immersion" name="immersion" width="165" height="165" border="0" id="immersion" /></a>
<a href="../architecture_projects/arcadian agriculture.html" onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('arcadianagriculture','','http://www.colinostman.com/project_directory/architecture_images/arcadianagriculture2.jpg',1)"><img src="http://www.colinostman.com/project_directory/architecture_images/arcadianagriculture1.jpg" alt="arcadianagriculture" name="arcadianagriculture" width="165" height="165" border="0" id="arcadianagriculture" /></a>
<a href="../architecture_projects/journey.html" onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('journey','','http://www.colinostman.com/project_directory/architecture_images/journey2.jpg',1)"><img src="http://www.colinostman.com/project_directory/architecture_images/journey1.jpg" alt="journey" name="journey" width="165" height="165" border="0" id="journey2" /></a>
</div>
<div id="column2">
<a href="../architecture_projects/confluence sculpture.html" onmouseout="MM_swapImgRestore();Link('lk2','black');" onmouseover="MM_swapImage('sculpture','','http://www.colinostman.com/project_directory/architecture_images/sculpture2.jpg',1);Link('lk2','red');"><img src="http://www.colinostman.com/project_directory/architecture_images/sculpture1.jpg" alt="sculpture" name="sculpture" width="165" height="165" border="0" id="sculpture" /></a>
<a href="../architecture_projects/courtyard campus.html" onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('courtyardcampus','','http://www.colinostman.com/project_directory/architecture_images/courtyardcampus2.jpg',1)"><img src="http://www.colinostman.com/project_directory/architecture_images/courtyardcampus1.jpg" alt="courtyardcampus" name="courtyardcampus" width="165" height="165" border="0" id="courtyardcampus" /></a>
<a href="../architecture_projects/portfolio.html" onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('portfolio','','http://www.colinostman.com/project_directory/architecture_images/portfolio2.jpg',1)"><img src="http://www.colinostman.com/project_directory/architecture_images/portfolio1.jpg" alt="portfolio" name="portfolio" width="165" height="165" border="0" id="portfolio" /></a>
<a href="../architecture_projects/telephone.html" onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('telephone','','http://www.colinostman.com/project_directory/architecture_images/telephone2.jpg',1)"><img src="http://www.colinostman.com/project_directory/architecture_images/telephone1.jpg" alt="telephone" name="telephone" width="165" height="165" border="0" id="telephone2" /></a>
</div>
</div>