function roll_unroll(item) {
	var target_div = document.getElementById("div_"+item);
	var target_icon = document.getElementById("ico_"+item);
	if (target_div.style.display == "") {
		target_icon.src = "/themes/default/arrow_d.gif";
		target_icon.alt = "Развернуть";
		target_div.style.display = "none";
	} else {
		target_icon.src = "/themes/default/arrow_l.gif";
		target_icon.alt = "Свернуть";
		target_div.style.display = "";
	}
}