css z-index multi level - html

Question

http://jsfiddle.net/Uqxxh/1/
I have a problem displaying a nav bar with a pic next to it. There is a zoom function in the pic. When mouse over it, an enlarged verion will be displayed.
I have a demo simulating the situation.
I have two requirements:
1. The enlarged tree should be on top of the nav bar.
2. The second level of nav bar shouold be on top of the small tree.
#container
{
width: 700px;
}
#contentLeft
{
width: 220px;
float: left;
z-index: 50;
}
#contentRight
{
width: 450px;
float: right;
z-index: 50;
}
#navBar > li
{
list-style-type: none;
position: relative;
color: #EAC789;
border-bottom: 1px dashed #EAC789;
background: #fff;
width: 200px;
line-height: 24px;
}
#navBar > li a
{
text-decoration: none;
color: #B38C51;
}
#navBar > li ul
{
position: absolute;
left: 200px;
top: 0;
width: 100%;
margin-left: 0;
padding-left: 0;
}
#navBar > li li
{
display: none;
background: #967644;
border-bottom: 1px dashed #fff;
color: #fff;
width: 100%;
line-height: 24px;
}
#navBar > li:hover li
{
display: block;
}
#navBar > li li a
{
color: #fff;
}
#mouseOverDiv
{
position: relative;
}
#mouseOverDiv .enlargePic
{
display: none;
position: absolute;
left: -200px;
top: 0;
}
#mouseOverDiv:hover img
{
border: 1px solid #000;
background: #fff;
}
#mouseOverDiv:hover .enlargePic
{
display: block;
z-index: 9999;
}

Answer 1

Apply z-index to #navBar > li ul should fix the issue
#navBar > li ul
{
position: absolute;
left: 200px;
top: 0;
width: 100%;
margin-left: 0;
padding-left: 0;
z-index:51;
}
FIDDLE
UPDATE
Apply z-index to this class
.rpSlide{
z-index:51;
}
Remove z-index from this class .MainLeft
Remove inline z-index from this main menu div
<div id="ctl00_ctl01_siteMenu" class="RadMenu RadMenu_Yaki" style="z-index: 7000;">
This should fix all of your issues you are having on this page