//JavaScript
function rq_up(){
document.getElementById("b1").src ="images/rq_up.jpg";
}
function rq_down(){
document.getElementById("b1").src ="images/rq_down.jpg";
}
function rl_up(){
document.getElementById("b2").src ="images/rl_up.jpg";
}
function rl_down(){
document.getElementById("b2").src ="images/rl_down.jpg";
}