<iframe id="if1" scrolling="no" src="2.html"></iframe>

<script type="text/javascript">
function resizeContent()
{
    $(window.parent.document).find("#if1").height($("#content").height());
}

function show400()
{
    if($("#test400").css("display") == "none")
    {
       $("#test400").css("display","");
       resizeContent();
    }
    else
    {
       $("#test400").css("display","none");
       resizeContent();
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}
$(document).ready(function(){
    resizeContent();
})
</script>
<div id="left111">
 <div class="mnav" onclick="test400()"></div>
 <div class="mnav"><a href="ProductList.html">超级链接</a></div>
 <div class="mnav"><a href="ProductCategory.html">超级链接</a></div>
 <div class="mnav"><a href="ProductCategory.html">超级链接</a></div>
 <div id="test400" style="display:none;height:400px;"></div>
 <div class="mnav"><a href="Orders.html">超级链接</a></div>
 <div class="mnav Mcurrent"><a href="Keywords.html">超级链接</a></div>
 <div class="mnav"><a href="#">超级链接</a></div>
 <div class="mnav"><a href="#">超级链接</a></div>
 <div class="mnav"><a href="#">超级链接</a></div>
 <div class="mnav"><a href="#">超级链接</a></div>
 <div class="mnav"><a href="#">超级链接</a></div>
 <div class="mnav"><a href="#">超级链接</a></div>
 <br />
</div>

$(window.parent.document).find("#if1").height($("#content").height()); 

$(window.parent.document).find("#if1").height($(document).height());