var topButtons = new Array();
var topButtonsOn = new Array();
var leftButtons = new Array();
var leftButtonsOn = new Array();

for(var i=1; i<=9; i++)
{
	topButtons[i] = new Image();
	topButtons[i].src = "layout/buttons_t_" + i + ".gif";
	topButtonsOn[i] = new Image();
	topButtonsOn[i].src = "layout/buttons_t_" + i + "_r.gif";
}

for(var i=1; i<=7; i++)
{
	leftButtons[i] = new Image();
	leftButtons[i].src = "layout/buttons_l_" + i + ".gif";
	leftButtonsOn[i] = new Image();
	leftButtonsOn[i].src = "layout/buttons_l_" + i + "_r.gif";
}

function turnon(loc, num)
{
	if (loc == 't')
	{
		document.getElementById('buttons_t_' + num).src = topButtonsOn[num].src;
	}
	else
	{
		document.getElementById('buttons_l_' + num).src = leftButtonsOn[num].src;
	}
}

function turnoff(loc, num)
{
	if (loc == 't')
	{
		document.getElementById('buttons_t_' + num).src = topButtons[num].src;
	}
	else
	{
		document.getElementById('buttons_l_' + num).src = leftButtons[num].src;
	}
}