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

function readCookie(name) {
	var nameEQ = name + "=";
	var cookies = document.cookie.split(';');
	for(var i=0;i < cookies.length;i++) {
		var currentCookie = cookies[i];
		currentCookie = trim(currentCookie);
		if (currentCookie.indexOf(nameEQ) == 0) 
			return currentCookie.substring(nameEQ.length,currentCookie.length);
	}
	return null;
}

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

 
function trim(string) {
	while('' + string.charAt(0) == ' ') {
		string = string.substring(1, string.length);
	}
	while('' + string.charAt(string.length-1)==' ') {
		string = string.substring(0, string.length-1);
	}
	return string;
}