function div_show (divname) {
	var divblock = document.getElementById (divname);
	if (divblock.style.display == "none") {
		divblock.style.display = "";
		var warnblock = document.getElementById('change-name-warning');
		warnblock.style.display = "";
		var update_submit = document.getElementById('submit-change-name-warning');
		update_submit.style.display = "";
		return false;
	}
	else {
		divblock.style.display = "none";
		return false;
	}
}