if (document.images)
{
	img1off = new Image();
	img1off.src = "images/tab_links1.gif"
	img1on = new Image();
	img1on.src = "images/tab_links2.gif"
	
	img2off = new Image();
	img2off.src = "images/tab_contact1.gif"
	img2on = new Image();
	img2on.src = "images/tab_contact2.gif"
}