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())
}

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 ""
}