function myGet(theID)
{
	return document.getElementById(theID);
}

function addon(imgID)
{
	var img = myGet(imgID);
	var img_src = img.src;
	if (img_src.indexOf("_on") != -1)
		return;
	var ext = img_src.substring(img_src.length-4);
	img.src = img_src.substring(0,img_src.length-4)+"_on"+ext;
}

function removeon(imgID)
{
	var img = myGet(imgID);
	var img_src = img.src;
	if (img_src.indexOf("_on") == -1)
		return;	
	var ext = img_src.substring(img_src.length-4);
	img.src = img_src.substring(0,img_src.length-7)+ext;
}

function EnableDate()
{
	myGet('datesImg').useMap="#datesMap";
}