function setCookie(name, value, expires) {
	document.cookie = name + "=" + escape(value) + "; path=/" +
	((expires ==null) ? "" : "; expires=" +
	expires.toGMTString());
}

function getCookie(name){
        var cname = name + "=";
        var dc = document.cookie; 
        if (dc.length > 0) {         
                begin = dc.indexOf(cname); 
                if (begin != -1) { 
                     begin += cname.length; 
                     end = dc.indexOf(";", begin);
                     if (end == -1) end = dc.length; 
                           return unescape(dc.substring(begin, end));
                }
        }
	return null;
}