function isCookie(cookieName){
  c = false;
  if(strCookie = document.cookie){
    if(arrCookie = strCookie.match( new RegExp( cookieName + '=([^;]*)', 'g'))){
      if(RegExp.$1.length>1 && RegExp.$1!=undefined){
        c = true;
      }
    }
  }
  return(c);
}


function remCookie() {
  if ( isCookie( "LoginData" ) )
  {
    path = "/";
    domain = false;
    document.cookie = "LoginData" + "=" + ( ( path ) ? ";path=" + path : "") + ( ( domain ) ? ";domain=" + domain : "" ) + ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
  }
}