function changeBg(id)
{

	document.getElementById(id).style.background = "url('images/btn.png') Bottom no-repeat";
}

function Bglong(id)
{

	document.getElementById(id).style.background = "url('images/btn-l.png') Bottom no-repeat";
}

function reBg(id)
{

	document.getElementById(id).style.background = "url('images/ombre.png') Bottom no-repeat";
}