//	Passing the parameter img which is the ID of the form Element.
//	If postfixed by '_On' or '_Off' parameter 'img' will also 
//	represents the name of the Image within images directory

function imgOn(img)
{
	document.getElementById(img).src = "/images/" + img + "_On.gif";
}

function imgOff(img)
{
	document.getElementById(img).src = "/images/" + img + "_Off.gif";
}