function _ChangeImage(aToDo)
{
	var div = document.getElementById("insymaWrap");
	if (aToDo == "1")
		div.style.backgroundImage = "url(../img/THF.jpg)"
	if (aToDo == "2")
		div.style.backgroundImage = "url(../img/THW.jpg)"
	if (aToDo == "3")
		div.style.backgroundImage = ""
}