/* used with permission */
/* http://www.quirksmode.org/js/cookies.html */

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

function readCookie(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 eraseCookie(name) {
	createCookie(name,"",-1);
}

function cookie_val(name,value,dur){
	if (value=='clear') {
		createCookie(name,"",-1);
	} else {
		createCookie(name,"",-1);
		if (dur) {
			createCookie(name,value,dur);
		} else {
			createCookie(name,value,365);
		}
	}
}

function cookie_url(name,value,url){
	createCookie(name,"",-1);
	createCookie(name,value,365);
	window.location = url;
}

/* variable content */

function cookie_lan(langs) {
	var setlang = readCookie('plang')
	if (setlang) {
		var nidl = ',' + setlang + ',';
		var hysk = ',' + langs + ',';
		var index = hysk.indexOf(nidl);
		if (index >= 0) {
			return setlang;
		} else {
			return '1';
		}
	} else {
		return '1';
	}
}