/**
 * Util Global Functions
 * Criado em 29/10/2006
 *
 * @author Daniel Araujo
 */
 
/**
 * Create a cookie.
 */
function createCookie(name, value, days) {
	var expires = '';
	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		expires = '; expires=' + date.toGMTString();
	} 
	document.cookie = name + '=' + value + expires + '; path=';
}

/**
 * Read a cookie.
 */
function readCookie(name) {
	var nameEQ = name + '=';
	var cookies = document.cookie.split(';');
	for (var i = 0; i < cookies.length; i++) {
		var cookie = cookies[i];
		while (cookie.charAt(0) == ' ') 
			cookie = cookie.substring(1, cookie.length);
		if (cookie.indexOf(nameEQ) == 0) 
			return cookie.substring(nameEQ.length, cookie.length);
	}
	return null;
}

/**
 * Delete a cookie (only close page).
 */
function eraseCookie(name) {
	createCookie(name, '', -1);
}