intenta con algo asi
Código:
<script language="Javascript">
<!--
function dis(el,el2)
{
document.getElementById(el).style.display="block"
}
//-->
</script>
<div id="i1">
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<a href="#" onclick="dis('i2');this.style.visibility='hidden';this.style.position='absolute';return false;">5 Mas</a>
</div>
<div style="display:none" id="i2">
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<a href="#" onclick="dis('i3');this.style.visibility='hidden';this.style.position='absolute';return false;">5 Mas</a>
</div>
<div style="display:none" id="i3">
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<a href="#" onclick="dis('i4');this.style.visibility='hidden';this.style.position='absolute';return false;">5 Mas</a>
</div>
<div style="display:none" id="i4">
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
<input name="" type="text" value=""><br>
</div>
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