if (document.images) 
	{

	button1 = new Image()
	button1.src = "images/btn_flights_off.gif"
	button1over = new Image()
	button1over.src = "images/btn_flights_on.gif"

	button2 = new Image()
	button2.src = "images/btn_hotels_off.gif"
	button2over = new Image()
	button2over.src = "images/btn_hotels_on.gif"

        button3 = new Image()
	button3.src = "images/btn_cars_off.gif"
	button3over = new Image()
	button3over.src = "images/btn_cars_on.gif"

	button4 = new Image()
	button4.src = "images/btn_vacations_off.gif"
	button4over = new Image()
	button4over.src = "images/btn_vacations_on.gif"

	}
	function switchimage(string,i) 
	{
	if (document.images) eval("document.button" + i + ".src = " + string) 
	}
// -->