/**
 * Create a cookie
 * 
 * @param name the cookie name
 * @param value the value to store in the cookie
 * @param days the expiration time
 */
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=/";
}

/**
 * Read a cookie
 * 
 * @param name the cookie name
 */
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;
}