var frac_normal = new Image();
frac_normal.src = "/img/frac_adress.gif";
var frac_over = new Image();
frac_over.src = "/img/frac_adress_2.gif";

function rollin()
{
	$('frac_adress').src = frac_over.src;
}

function rollout()
{
	$('frac_adress').src = frac_normal.src;
}