var but1n = new Image()
but1n.src = "images/individual-on.gif"
var but1a = new Image()
but1a.src = "images/individual.gif"
var but2n = new Image()
but2n.src = "images/news-signup-on.gif"
var but2a = new Image()
but2a.src = "images/news-signup.gif"


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