function getCookie(c_name) {
	if (document.cookie.length > 0) {
		c_start = document.cookie.indexOf(c_name + "=");
		if (c_start != -1) {
			c_start = c_start + c_name.length + 1;
			c_end = document.cookie.indexOf(";",c_start);
			if (c_end == -1) c_end = document.cookie.length;
			return unescape(document.cookie.substring(c_start,c_end));
		}
	}
	return ""
}

function setCookie(c_name,value,expiredays) {
	var exdate = new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value) + ((expiredays==null) ? "" : "; expires="+exdate.toGMTString()+"; path=/");
}

function deleteCookie(c_name) {
	if (getCookie(c_name)) {
		document.cookie = c_name + "=;expires=Thu, 01-Jan-1970 00:00:01 GMT";
	}
}