function show_hide(el) {
if ( $(el).css("display") == 'none')
    $(el).show(400);
else
    $(el).hide(400);
}


function showhidevis(el) {
	
if ($(el).css("visibility") == 'hidden')
		visibleState = true;
else
	visibleState = false;
	
	$(el).css("visibility",(visibleState ? "visible" : "hidden"));
}