function set_on(obj){
	obj.style.filter="Alpha(opacity=75, finishopacity=75, style=1)";
	obj.style.opacity = 0.8;
}

function set_off(obj){
	obj.style.filter="Alpha(opacity=100, finishopacity=100, style=1)";
	obj.style.opacity = 1;
}

function setImg(id, imgPath){
	var elm = document.getElementById(id);
	elm.src = imgPath;
}