*{ margin:0px auto; opacity:0px;}
#s1{width:150px; height:300px; position:fixed; left:100px; top:100px;}
.yiji{ width:150px; height:35px; background-color:#93C; border:1px solid white; text-align:center; line-height:35px; vertical-align:middle; clear:white; font-weight:bold}
#aa1{ width:150px; display:none}
.qqq1{ width:150px; height:35px; background-color:#0F0; border:1px solid white; text-align:center; line-height:35px; vertical-align:middle; clear:white; font-weight:bold}
#aa2{ width:150px; display:none}
.yyy2{ width:150px; height:35px; background-color:#0F0; border:1px solid white; text-align:center; line-height:35px; vertical-align:middle; clear:white; font-weight:bold}
#aa3{ width:150px; display:none}
.www2{ width:150px; height:35px; background-color:#0F0; border:1px solid white; text-align:center; line-height:35px; vertical-align:middle; clear:white; font-weight:bold}

<div id="s1" style="width:150px; height:300px">
<div class="yiji" onclick="caidan(‘aa1‘)">
QQ
</div>
<div id="aa1">
<div class="qqq1">111</div>
<div class="qqq1">222</div>
<div class="qqq1">333</div>
</div>



<div class="yiji" onclick="caidan(‘aa2‘)">
YY
</div>
<div id="aa2">
<div class="yyy2">111</div>
<div class="yyy2">222</div>
<div class="yyy2">333</div>
</div>

<div class="yiji" onclick="caidan(‘aa3‘)">
微信
</div>
<div id="aa3">
<div class="www2">111</div>
<div class="www2">222</div>
<div class="www2">333</div>
</div>

</div>

</body>

<script type="application/javascript">
function caidan(d)
{
var aa = document.getElementById(d);
if(aa.style.display=="block")
{
aa.style.display="none";
}
else
{
aa.style.display = "block";
}
}
</script>

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