var bt_name=new Array();
var bt_name2=new Array();

bt_name[0] ="images/bt_30year.gif";
bt_name[1] ="images/bt_profile.gif";
bt_name[2] ="images/bt_bhp.gif";
bt_name[3] ="images/bt_activity.gif";
bt_name[4] ="images/bt_schedule.gif";


bt_name2[0] ="images/bt_30year2.gif";
bt_name2[1] ="images/bt_profile2.gif";
bt_name2[2] ="images/bt_bhp2.gif";
bt_name2[3] ="images/bt_activity2.gif";
bt_name2[4] ="images/bt_schedule2.gif";


var bt1=new Array();
var bt2=new Array();

for ( i=0; i<bt_name.length; i++ )
{
	bt1[ i ] = new Image();	bt1[ i ].src = bt_name[ i ];
	bt2[ i ] = new Image();	bt2[ i ].src = bt_name2[ i ];
}

function mouse_in( witch )
{
	document.images["orange"+ witch].src=bt1[witch].src;
}

function mouse_out(witch)
{
	document.images["orange"+ witch].src=bt2[witch].src;
}