function escreveCookie(key, value) {  
         var the_cookie = key + "=" + value + ";" ;  
         document.cookie = the_cookie;  
}

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 leCookie(name){
  var cookieValue = "";
  var search = name + "=";
  if(document.cookie.length > 0){ 
    offset = document.cookie.indexOf(search);
    if (offset != -1){ 
      offset += search.length;
      end = document.cookie.indexOf(";", offset);
      if (end == -1) end = document.cookie.length;
      cookieValue = unescape(document.cookie.substring(offset, end))
    }
  }
  return cookieValue;
}