//Navigation buttons
	nav_but_is_off = new Image();
	nav_but_is_off.src = '/images/navbar/is.gif'
	nav_but_is_on = new Image();
	nav_but_is_on.src = '/images/navbar/is2.jpg'
	nav_but_mf_off = new Image();
	nav_but_mf_off.src = '/images/navbar/mf.gif'
	nav_but_mf_on = new Image();
	nav_but_mf_on.src = '/images/navbar/mf2.jpg'
	nav_but_of_off = new Image();
	nav_but_of_off.src = '/images/navbar/if.gif'
	nav_but_of_on = new Image();
	nav_but_of_on.src = '/images/navbar/if2.jpg'
	nav_but_aa_off = new Image();
	nav_but_aa_off.src = '/images/navbar/access.gif'
	nav_but_aa_on = new Image();
	nav_but_aa_on.src = '/images/navbar/access2.jpg'
	
	//Menu arrows
	arrow_off = new Image();
	arrow_off.src = '/images/navbar/arrow.gif';
	arrow_on = new Image();
	arrow_on.src = '/images/navbar/arrow2.gif';
	arrow_blank = new Image();
	arrow_blank.src = '/images/navbar/empty.gif';