var teeImageDirectory = "images/tees/";
var ballMarkerImageDirectory = "images/ballmarker/";

function changeTeeImage()
{
	var teeImage = document.getElementById("teeImage");
	var teeColor = document.teeForm.tee_color.options[document.teeForm.tee_color.selectedIndex].value;
	if (teeImage)
	{
		teeImage.src = teeImageDirectory + "tee_" + teeColor + ".jpg";
		teeImage.alt = teeColor + " tee";
	}
}

function changePackImage()
{
	var theImage = document.getElementById("packImage");
	var theValue = getSelectedRadioButtonValue(document.teeForm.item_type);
	if (theValue)
	{
		theImage.src = "images/packs/" + theValue + ".jpg";
	}
}

function changePencilImage()
{
	var theImage = document.getElementById("pencilImage");
	var theValue = getSelectedRadioButtonValue(document.teeForm.item_type);
	if (theValue)
	{
		theImage.src = "images/pencils/pencil_" + theValue + ".gif";
	}
}

function getSelectedRadioButtonValue(theRadioButton)
{
	for (var i=0; i<theRadioButton.length; i++)
	{
		if (theRadioButton[i].checked)
		{
			return theRadioButton[i].value;
			break;
		}
	}
	
	return "";
}

function pickSelectBoxValue(theSelectBox, theValue)
{
	for (var i=0; i<theSelectBox.options.length; i++)
	{
		if (theSelectBox.options[i].value == theValue)
		{
			theSelectBox.options[i].selected = true;
			break;
		}
	}
}