// will switch displaying of an element,
// intented for the sparten.
// @param	name	id of element
function switch_visibility(name) {
	obj = document.getElementById(name);

	if(obj.style.display == '') {
		create_cookie("_element_"+name+"_display", "n", 1);
		obj.style.display = "none";
	} else {
		create_cookie("_element_"+name+"_display", "y", 1);
		obj.style.display = "";
	}
}

function field_brightness(name) {
	obj = document.getElementsById(name);

	if(obj.style.borderColor == "#bbb")
		obj.style.borderColor = "#888";
	else
		obj.style.borderColor = "#bbb";
}


function set_stylesheet(title) {
	var i, a, main;
	for(i=0;(a = document.getElementsByTagName("link")[i]);i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
			a.disabled = true;
			if(a.getAttribute("title") == title)
				a.disabled = false;
		}
	}
}

function get_stylesheet() {
	var i, a;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled)
			return a.getAttribute("title");
  	}
	return null;
}

function get_default_stylesheet() {
	var i, a;
	for(i=0;(a=document.getElementsByTagName("link")[i]);i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("rel").indexOf("alt") == -1 && a.getAttribute("title"))
			return a.getAttribute("title");
	}
	return null;
}

function create_cookie(name, value, days) {
	var expires;
	if(days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		expires = "; expires="+date.toGMTString();
	} else
		expires = "";

	document.cookie = name+"="+value+expires+"; path=/";
}

function read_cookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function erase_cookie(name) {
	create_cookie(name, "", -1);
}
/*
window.onload = function() {
	var i,a;

	var cookie = read_cookie("style");
	if(cookie) {
		var title = cookie ? cookie : get_default_stylesheet();
		set_stylesheet(title);
	}

	for(i=0;(a=document.getElementsByTagName("div")[i]);i++) {
		cookie = read_cookie("_element_"+a.getAttribute("id")+"_display");
		var id = "_element_"+a.getAttribute("id")+"_display";
		if(cookie && id != "_element__display") {
			if(cookie == "y")
				a.style.display = "";
			else
				a.style.display = "none";
		}
	}
}

window.onunload = function() {
	var title = get_stylesheet();
	create_cookie("style", title, 1);
}
*
*/