/*
 * ÉèÖÃcookie
 */
function setCookie(sName, sValue)
{
	document.cookie = sName + "=" + escape(sValue) + ";path=/";
}
/*
 * »ñÈ¡cookie
 */
function getCookie(sName)
{
	var aCookie = document.cookie.split("; ");
	  
	for (var i = 0; i < aCookie.length; i++)
	{
		var aCrumb = aCookie[i].split("=");
		    
		if (sName == aCrumb[0]) 
			return unescape(aCrumb[1]);
	}

	return null;
}
/*
 * ɾ³ýcookie
 */
function delCookie(sName)
{
	document.cookie = sName + "=" + escape("sValue") + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}