[Deff]

<style type="text/css">
div[class] {
 border:red solid 1px;
 width:130px;
 margin:2px;
 padding:6px;
}
div[id] {
 width:230px;
 height:40px;
 padding:6px;
 border:blue solid 1px;
}
</style>


<script type="text/javascript">
var obj={
   Marker:'Текст для Marker', 
   products:'Текст для products', 
   services:'BLa-BLa-Текст для services'
}
function change1(elem) {
document.getElementById('center').innerHTML = obj[elem.className];
}
</script>


<div id="center"></div>

<br />
<br />
<div onclick="change1(this)" class="products"></div>
<div onclick="change1(this)" class="services"></div>
<div onclick="change1(this)" class="Marker"></div>