function Cookie(){
}
Cookie.prototype.set=
function(s,v,expiredays){
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=s+"="+escape(v)+
		((expiredays==null)?"":";expires="+exdate.toGMTString());
}
Cookie.prototype.get=
function(s){
	if (document.cookie.length>0){
c_start=document.cookie.indexOf(s+"=");
if (c_start!=-1){ 
	c_start=c_start+s.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 "";
}