function setActiveFeature(id, isActive) {
	var currDiv = document.getElementById(id);
	var currClass = currDiv.className;
	if (isActive) {
		if (currClass == "") 
			currDiv.className += "active";
		else 
			currDiv.className += " active";
	}
	else {
		if (currClass == "active") 
			currDiv.className = "";
		else 
			currDiv.className = currDiv.className.replace(" active", "");
	}
}