Hey all,

As a JS rookie I've managed to toggle specific backgrounds on multiple mouseovers. The code below does exactly what I want, but I'm not quite satisfied with the way it's done.

The definite webpage will contain a lot of projectboxes, and for each project I need to add two functions in my script. Not very efficient. I'm looking for a single function which works in the same way, preferably making use of an array where I can add new projectimages. Any help on this would be greatly apprciated!

Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Switch backgrounds on mouseover</title>
<style type="text/css">
.projectbox {
margin-right: 15px;
float: left;
}

.imgbox {
width: 265px;
height: 100px;
display: block;
}

.imgbox a.img1_off {
background: url(http://www.boomboxfestival.nl/test3/dummy1_off.jpg) no-repeat;	
}

.imgbox a.img1_on {
background: url(http://www.boomboxfestival.nl/test3/dummy1_on.jpg) no-repeat;	
}

.imgbox a.img2_off {
background: url(http://www.boomboxfestival.nl/test3/dummy2_off.jpg) no-repeat;	
}

.imgbox a.img2_on {
background: url(http://www.boomboxfestival.nl/test3/dummy2_on.jpg) no-repeat;	
}

.imgbox a.img3_off {
background: url(http://www.boomboxfestival.nl/test3/dummy3_off.jpg) no-repeat;	
}

.imgbox a.img3_on {
background: url(http://www.boomboxfestival.nl/test3/dummy3_on.jpg) no-repeat;	
}

.titlebox h1 {
font: 11px/10px Arial, Helvetica, sans-serif;
text-transform: uppercase;
float: left;
margin-right: 3px;
}

.titlebox h1 a {
display: block;
background: #ccc;
color: #fff;
text-decoration: none;
padding: 2px 3px;
}

.titlebox h1 a.title_off {
background: #ccc;	
}

.titlebox h1 a.title_on {
background: #000;	
}
</style>

<script language="javascript" type="text/javascript">

function switchTitle(objDivID)
{
	document.getElementById(objDivID).className = 'title_on';
}

function resetTitle(objDivID)
{
  document.getElementById(objDivID).className = 'title_off';
}  

function switchImage1(objDivID)
{
	document.getElementById(objDivID).className = 'img1_on imgbox';
}

function resetImage1(objDivID)
{
  document.getElementById(objDivID).className = 'img1_off imgbox';
}

function switchImage2(objDivID)
{
	document.getElementById(objDivID).className = 'img2_on imgbox';
}

function resetImage2(objDivID)
{
  document.getElementById(objDivID).className = 'img2_off imgbox';
}

function switchImage3(objDivID)
{
	document.getElementById(objDivID).className = 'img3_on imgbox';
}

function resetImage3(objDivID)
{
  document.getElementById(objDivID).className = 'img3_off imgbox';
}

</script>
</head>

<body>

<div class="projectbox">
   <div class="imgbox">
      <a href="#" id="projectimg1" class="img1_off imgbox" title="Bekijk die toffe ****" 
      onmouseover="switchImage1('projectimg1'); switchTitle('projecttitle1')" 
      onmouseout="resetImage1('projectimg1'); resetTitle('projecttitle1')"></a>
   </div>
   <div class="titlebox">
      <h1><a href="#" id="projecttitle1" class="title_off" 
      onmouseover="switchImage1('projectimg1'); switchTitle('projecttitle1')" 
      onmouseout="resetImage1('projectimg1'); resetTitle('projecttitle1')">Title project 1</a></h1>
   </div>
</div>
<div class="projectbox">
   <div class="imgbox">
      <a href="#" id="projectimg2" class="img2_off imgbox" title="Bekijk die toffe ****" 
      onmouseover="switchImage2('projectimg2'); switchTitle('projecttitle2')" 
      onmouseout="resetImage2('projectimg2'); resetTitle('projecttitle2')"></a>
   </div>
   <div class="titlebox">
      <h1><a href="#" id="projecttitle2" class="title_off" 
      onmouseover="switchImage2('projectimg2'); switchTitle('projecttitle2')" 
      onmouseout="resetImage2('projectimg2'); resetTitle('projecttitle2')">Title project 2</a></h1>
   </div>
</div>
<div class="projectbox">
   <div class="imgbox">
      <a href="#" id="projectimg3" class="img3_off imgbox" title="Bekijk die toffe ****" 
      onmouseover="switchImage3('projectimg3'); switchTitle('projecttitle3')" 
      onmouseout="resetImage3('projectimg3'); resetTitle('projecttitle3')"></a>
   </div>
   <div class="titlebox">
      <h1><a href="#" id="projecttitle3" class="title_off" 
      onmouseover="switchImage3('projectimg3'); switchTitle('projecttitle3')" 
      onmouseout="resetImage3('projectimg3'); resetTitle('projecttitle3')">Title project 3</a></h1>
   </div>
</div>

</body>
</html>