.p2 {
	BORDER-RIGHT: black 1px solid; BORDER-TOP: black 1px solid; FILTER: alpha(Opacity=50); BORDER-LEFT: black 1px solid; BORDER-BOTTOM: black 1px solid
}
.p1 {
	BORDER-RIGHT: black 1px solid; BORDER-TOP: black 1px solid; BORDER-LEFT: black 1px solid; BORDER-BOTTOM: black 1px solid
}
.p3 {
	BORDER-RIGHT: black 1px solid; BORDER-TOP: black 1px solid; FILTER: alpha(Opacity=50); BORDER-LEFT: black 1px solid; BORDER-BOTTOM: black 1px solid
}

.p2{ FILTER: alpha(Opacity=50); border: 1px black solid; }
.p1{ border: 1px black solid; }
.p3{ border: 1px black solid;  FILTER: alpha(Opacity=50); }

function po(o){o.className=='p1'?o.className='p2': o.className=o.className; }
function px(o){o.className=='p2'?o.className='p1': o.className=o.className; }
function pc(o){o.className='p3'; }