function sqr_show(id) {
	var item = null;

	item = document.getElementById(id);

	if (item && item.style) {
		if (item.style.display == "none") {
			item.style.display = "";
		}
	}
	else if (item) {
		item.visibility = "show";
	}
}

function sqr_hide(id) {
	var item = null;

	item = document.getElementById(id);
	
	if (item && item.style) {
		if (item.style.display != "none") {
			item.style.display = "none";
		}
	}
	else if (item) {
		item.visibility = "hide";
	}
}