function addOnloadEvent(fnc){
  if ( typeof window.addEventListener != "undefined" ) {
    window.addEventListener( "load", fnc, false );
  } else if ( typeof window.attachEvent != "undefined" ) {
    window.attachEvent( "onload", fnc );
  } else {
    if ( window.onload != null ) {
      var oldOnload = window.onload;
      window.onload = function ( e ) {
        oldOnload( e );
        window[fnc]();
      }
    } else {
      window.onload = fnc;
    }
  }

}