leftOff = new Image
leftOn = new Image
leftDown = new Image

leftOff.src = "images/common/left_off.gif"
leftOn.src = "images/common/left_on.gif"
leftDown.src = "images/common/left_down.gif"


rightOff = new Image
rightOn = new Image
rightDown = new Image

rightOff.src = "images/common/right_off.gif"
rightOn.src = "images/common/right_on.gif"
rightDown.src = "images/common/right_down.gif"

selectOff = new Image
selectOn = new Image

selectOff.src = "images/common/select_off.gif"
selectOn.src = "images/common/select_on.gif"

function rollLeft(which,status)
{	if (status == "on")
	{	document.getElementById("left" + which).src = leftOn.src
	}
	else if (status == "off")
	{	document.getElementById("left" + which).src = leftOff.src
	}
	else if (status == "down")
	{	document.getElementById("left" + which).src = leftDown.src
	}
}

function rollRight(which,status)
{	if (status == "on")
	{	document.getElementById("right" + which).src = rightOn.src
	}
	else if (status == "off")
	{	document.getElementById("right" + which).src = rightOff.src
	}
	else if (status == "down")
	{	document.getElementById("right" + which).src = rightDown.src
	}
}

function rollSub(obj,status)
{	if (status)
	{	obj.className = "bgOn"
	}
	else
	{	obj.className = "bgOff"
	}
}

function rollSubIndent(obj,status)
{	if (status)
	{	obj.className = "bgIndentOn"
	}
	else
	{	obj.className = "bgIndentOff"
	}
}

var menuStatus = false

function menuToggle()
{	if (menuStatus)
	{	document.getElementById("menu").style.visibility = "hidden"
		document.getElementById("selectButton").src = selectOff.src
	}
	else
	{	document.getElementById("menu").style.visibility = "visible"
		document.getElementById("selectButton").src = selectOn.src
	}
	menuStatus = !menuStatus
}


function showChart(which)
{	document.getElementById("fig" + which + "Ex").style.visibility = "visible"
}

function hideChart(which)
{	document.getElementById("fig" + which + "Ex").style.visibility = "hidden"
}