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 "";
}
 
function setCookie(c_name,value,expiredays,path,domain)
{
  var exdate=new Date();
  exdate.setDate(exdate.getDate()+expiredays);
  document.cookie=c_name+ "=" +escape(value)+
  ( ( path==null ) ? "" : ";path=" + path ) +
  ( ( domain==null ) ? "" : ";domain=" + domain ) +
  ((expiredays==null || expiredays==0) ? "" : ";expires="+exdate.toGMTString());
}

function delCookie( name, path, domain )
{
  if ( getCookie( name ) )
  {
    document.cookie = name + "=" + 
    (path==null ? "" : ";path=" + path) +
    (domain==null ? "" : ";domain=" + domain ) +
      
    ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
  }


}