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;   
  }   
}