function setVisibility(div_ID, sVisibility) {
	var div_target = document.getElementById(div_ID);
	//
	div_target.style.visibility = sVisibility;
}

function setBackground(div_ID, bg_img) {
	var div_target = document.getElementById(div_ID);
	//
	div_target.style.backgroundImage="url("+bg_img+")";
}