function get_browser_specific_object (item)
{
	if (document.layers)
	{
		var browser_specific_object=document.layers[item];
	}
	else if (document.all)
	{
		var browser_specific_object=document.all(item).style;
	}
	else if (document.getElementById)
	{
		var browser_specific_object=document.getElementById(item).style;
	}

	return browser_specific_object;
}

function roll_on(menuitem)
{
	var roll_object=get_browser_specific_object(menuitem);

	roll_object.color='yellow';
}

function roll_off(menuitem)
{
	var roll_object=get_browser_specific_object(menuitem);
		
	roll_object.color='black';
}

function move_up(item)
{
	var move_object=get_browser_specific_object(item);
	
	move_object.top=200;
}

function move_down(item)
{
	var move_object=get_browser_specific_object(item);
	
	move_object.top=450;
}

function reveal_item(item)
{
	if (document.layers)
	{
		var visible='show';
		var hidden='hide';
		var item_var=document.layers[item];
	}
	else if (document.all)
	{
		var visible='visible';
		var hidden='hidden';
		var item_var=document.all(item).style;
	}
	else if (document.getElementById)
	{
		var visible='visible';
		var hidden='hidden';
		var item_var=document.getElementById(item).style;
	}

	if (item_var.visibility=hidden)
	{
		item_var.visibility=visible;
	}
}

function hide_item(item)
{
	if (document.layers)
	{
		var visible='show';
		var hidden='hide';
		var item_var=document.layers[item];
	}
	else if (document.all)
	{
		var visible='visible';
		var hidden='hidden';
		var item_var=document.all(item).style;
	}
	else if (document.getElementById)
	{
		var visible='visible';
		var hidden='hidden';
		var item_var=document.getElementById(item).style;
	}

	if (item_var.visibility=visible)
	{
		item_var.visibility=hidden;
	}
}