Texto que se oculta al clickar el link

[kike2lucas]

Ok. El código es este.

<script>
function mostrar(enla) {
obj = document.getElementById('oculto'+enla);
obj.style.display = (obj.style.display == 'block') ? 'none' : 'block';
enla.innerHTML = (enla.innerHTML == 'x') ? 'read more' : 'x';
}

</script>

y los div, estos:

<b>TSSA</b>: Technical Service Support Agreements [<a class="int" href="#" onclick="mostrar('1'); return false" />read more</a>]<br />
<div id="oculto1" style="display:none">
<span class="red">Engine/APU fleet management service delivering</span>: Maintenance tendering &amp; MRO contract negotiation; Maintenance policy &amp; procedures development ; fleet life cycle cost management; shop visit scheduling and budget planning; engine condition monitoring &amp; on-wing troubleshooting; shop visit credit negotiations; warranty &amp; insurance claim processing; component scrap reviews; PMA &amp; DER analysis and recommendation; OEM representation; AD &amp; SB monitoring &amp; recommendation; LLP &amp; component soft time monitoring.<br />
</div>

<br />
<b>FSSA</b>: Field Service Support Agreements [<a class="int" href="#" onclick="mostrar('2'); return false" />read more</a>]<br />
<div id="oculto2" style="display:none">
Engine /APU borescope inspections, on-wing troubleshooting, return to service certification (EASA/FAA)<br />
<br />
</div>
<br />

Ya les digo, de Javscript no me entero de nada. Gracias