function ToggleAllCheckBoxes(on) 
{
	var checks = document.getElementsByTagName("SELECT");

	for (var i = 0; i < checks.length; i++)
	{
		checks[i].style.visibility = on ? "visible" : "hidden";
	}
}

function SetupMenuIE() 
{
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");

	for (var i=0; i<sfEls.length; i++)
	{
		sfEls[i].onmouseover=function()	{ this.className+=" sfhover"; ToggleAllCheckBoxes(); }
		sfEls[i].onmouseout=function()	{ this.className=this.className.replace(new RegExp(" sfhover\\b"), ""); ToggleAllCheckBoxes(1); }
	}
}

if (window.attachEvent) window.attachEvent("onload", SetupMenuIE);