I found a nice css3 dropdown script, but I can't abandon ie8 users because last I read the are still 10% of visits. So, I tried this:
<div id="containerdiv" style="height: 35px; overflow: visible;" >
<a href="#"><img src="images/1.jpg"></a>
<a href="#"><img src="images/2.jpg"
onmouseenter="document.getElementById('navdd1').style.display = ''"></a>
<div id="navdd1"
style="
display: none;
margin-left: 100px;
background-image:url('images/blank_dropdown.jpg');
line-height: 35px;
width: 100px;"
onmouseleave="document.getElementById('navdd1').style.display = 'none'">
<a href="#">Link 1</a><br>
<a href="#">Link 2</a><br>
</div>
</div>
The mouseenter and mouseleave seem to do what I want, but the un-hidden div stretches the container instead of overflowing it. I'll use php to detect their browser and only present this when they are on IE < 9. Ironically, the overflow portion of this does what I want in FF, but of course the mouseleave does not. How do I make this work?