<script>
function show(toShow) {
var t_show = document.getElementById(toShow);
if(t_show.style.display=="none") t_show.style.display = "";
else t_show.style.display="none";
}
</script>
<a href="java script:show('div1')"><b>div1</b></a> <br>
<div id="div1" style="display:none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div1<br>
<a href="java script:show('div2')"><b>div2</b></a> <br>
<div id="div2" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div2<br>
<a href="java script:show('div3')"><b>div3</b></a> <br>
<div id="div3" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div3<br>
</td></tr>
</table>
</div>
<a href="java script:show('div4')"><b>div4</b></a>
<div id="div4" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div4<br>
</td></tr>
</table>
</div>
</td></tr>
</table>
</div>
<a href="java script:show('div5')"><b>div5</b></a>
<div id="div5" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div5<br>
<a href="java script:show('div6')"><b>div6</b></a> <br>
<div id="div6" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div6<br>
</td></tr>
</table>
</div>
<a href="java script:show('div7')"><b>div7</b></a>
<div id="div7" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div7<br>
</td></tr>
</table>
</div>
</td></tr>
</table>
</div>
<br><br>
</td></tr>
</table>
</div>
<a href="java script:show('div8')"><b>div8</b></a> <br>
<div id="div8" style="display:none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
<a href="java script:show('div9')"><b>div9</b></a>
<div id="div9" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div9<br>
<a href="java script:show('div10')"><b>div10</b></a> <br>
<div id="div10" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div10<br>
</td></tr>
</table>
</div>
<a href="java script:show('div11')"><b>div11</b></a>
<div id="div11" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div11<br>
</td></tr>
</table>
</div>
</td></tr>
</table>
</div><br>
<a href="java script:show('div12')"><b>div12</b></a>
<div id="div12" style="display: none;position:relative;left:5%;z-index:1">
<table width="95%" border="1">
<tr><td>
div12<br>
</td></tr>
</table>
</div>
<br>
</td></tr>
</table>
</div>
<br>