function setOpacityUp(id) {
	document.getElementById(id).style.opacity = 1;
	document.getElementById(id).style.filter = 'alpha(opacity=100)';
}

function setOpacityDown(id) {
	document.getElementById(id).style.opacity = 0.6;
	document.getElementById(id).style.filter = 'alpha(opacity=60)';
}