![:-S](http://static.forosdelweb.com/fdwtheme/images/smilies/crap.png)
![:-S](http://static.forosdelweb.com/fdwtheme/images/smilies/crap.png)
![:-S](http://static.forosdelweb.com/fdwtheme/images/smilies/crap.png)
Alguna idea. Gracias de antemano.
<div>
<form etc...>
<script>
function change-layer() {
if (document.getElementById('activate-send').style.display='block';) {
document.getElementById('activate-send').style.display='none';
}else{
document.getElementById('activate-send').style.display='block';
}
}
</script>
<input type="checkbox" onclick="change-layer()">
</form>
<div id="activate-send" style="
font-size: 15px;
width: 198px;
height: 65px;
padding: 10px;
display: block;
">
</div>
</div>