var but1n = new Image()
but1n.src = "images/fp_pic1_up.jpg"
var but1a = new Image()
but1a.src = "images/fp_pic1_down.jpg"
var but2n = new Image()
but2n.src = "images/fp_pic2_up.jpg"
var but2a = new Image()
but2a.src = "images/fp_pic2_down.jpg"
var but3n = new Image()
but3n.src = "images/fp_pic3_up.jpg"
var but3a = new Image()
but3a.src = "images/fp_pic3_down.jpg"


function act(imgName) {
document[imgName].src = eval(imgName + 'n.src')
}
function inact(imgName) {
document[imgName].src = eval(imgName + 'a.src')
}