function al(o)
{
sf = o.className.substring(o.className.length - 2, o.className.length);
if ((sf == "_o") || (sf == "_a"))
	o.className = o.className.substring(0, o.className.length - 2);
}
function aact(o)
{
sf = o.className.substring(o.className.length - 2, o.className.length);
if (sf == "_o")
	o.className = o.className.substring(0, o.className.length - 2) + "_a";
else if (sf != "_a")
	o.className = o.className + "_a";
}
function aovr(o)
{
sf = o.className.substring(o.className.length - 2, o.className.length);
if (sf == "_a")
	o.className = o.className.substring(0, o.className.length - 2) + "_o";
else if (sf != "_o")
	o.className = o.className + "_o";
}