var im1_off=new Image();
im1_off.src="images/bt_history_off.gif";
var im1_on=new Image();
im1_on.src="images/bt_history_on.gif";

var im2_off=new Image();
im2_off.src="images/bt_activities_off.gif";
var im2_on=new Image();
im2_on.src="images/bt_activities_on.gif";

var im3_off=new Image();
im3_off.src="images/bt_map_off.gif";
var im3_on=new Image();
im3_on.src="images/bt_map_on.gif";

var im4_off=new Image();
im4_off.src="images/bt_events_off.gif";
var im4_on=new Image();
im4_on.src="images/bt_events_on.gif";

var im5_off=new Image();
im5_off.src="images/bt_family_off.gif";
var im5_on=new Image();
im5_on.src="images/bt_family_on.gif";

var im6_off=new Image();
im6_off.src="images/bt_usefulinfo_off.gif";
var im6_on=new Image();
im6_on.src="images/bt_usefulinfo_on.gif";

function openMap() {
	window.open('map.html','','width=870,height=700');
}