img1_dat = new Image();
	img1_dat.src = "../images/data_navtop_login_mo.gif";
	img1a_dat = new Image();
	img1a_dat.src = "../images/data_navmain_login_mo.gif";
	img2_dat = new Image();
	img2_dat.src = "../images/data_navtop_demo_mo.gif";	
	img2a_dat = new Image();
	img2a_dat.src = "../images/data_navmain_demo_mo.gif";	
	
	
	function show_one(imgnumber,numbername)
	{	
		parent.frametop.document[numbername].src = imgnumber;
		return true;
	}	

	function hide_one(imgnumber,numbername)
	{	
		parent.frametop.document[numbername].src = imgnumber;
		return true;
	}