var current_menu = '';
var timeout = '';

function button_show_menu( menu )
{
	if ( current_div = document.getElementById( menu + "_div" ) )
	{
		current_div.onmouseover();
	}
}

function button_hide_menu( menu )
{
	if ( current_div = document.getElementById( menu + "_div" ) )
	{
		timeout = window.setTimeout( "current_div.onmouseout()", 200 );
	}
}

function show_menu( menu )
{
	window.clearTimeout( timeout );
	if ( current_menu != menu )
	{

		hide_menu( current_menu );
		current_menu = menu;
		if ( ( current_div = document.getElementById( menu + "_div" ) ) )
		{
			current_div.style.display = 'block';
		//	current_img.src='images/nav-' + menu + 'hover.gif';
		}
	}
}

function hide_menu( menu )
{
	if ( ( current_div = document.getElementById( menu + "_div" ) ) )
	{
		current_div.style.display = 'none';
		//current_img.src='images/nav-' + menu + 'off.gif';
		current_menu = '';
	}
}