<script type="text/javascript">
function preview(val){
if(val == 1){
document.getElementById('rvd_1').style.display="block";
document.getElementById('rvd_2').style.display="none";
}
else{
document.getElementById('rvd_1').style.display="none";
document.getElementById('rvd_2').style.display="block";
}
}
</script>
<DIV ID="rvd_1" onclick="preview(2)">vidim</DIV>
<DIV STYLE="display:none" ID="rvd_2" onclick="preview(1)">skrit</DIV>