function removeString(s, t) {

  i = s.indexOf(t);
  r = "";
  if (i == -1) return s;
  r += s.substring(0,i) + removeString(s.substring(i + t.length), t);
  return r;
  }

function AlternarImagen(img) {
	var searchString = '_ON';
	var imgSrc = img.src.toUpperCase();
	var index = imgSrc.indexOf(searchString);

	if ( index > 0 ) {
      img.src = removeString(imgSrc, searchString);

      //img.src = imgSrc.substring(0,imgSrc.indexOf(searchString)) + remove(imgSrc.substring(i + searchString.length), searchString);
	} else {

	  var ext = imgSrc.substring(imgSrc.length-4, imgSrc.length );

      var leading = imgSrc.substring(0, imgSrc.length-4);

      var trailing = imgSrc.substring(imgSrc.length-4, imgSrc.length);

	  img.src = leading + searchString + trailing;
	}
}


var menuItems =
[

['<img src=/images/btn_expedientes.jpg border="0" onmouseover="AlternarImagen(this)" onmouseout="AlternarImagen(this)" alt="Expedientes&nbsp;Mineros" />',"/portal/expedients/GetExpedient.aspx","","","","_self","0", , , , , ],
['<img src=/images/btn_formularios.jpg border="0" onmouseover="AlternarImagen(this)" onmouseout="AlternarImagen(this)" alt="Formulario&nbsp;de&nbsp;Denuncias" />',"/formulario_denuncias","","","","_self","0", , , , , ],
['<img src=/images/btn_proyectos.jpg border="0" onmouseover="AlternarImagen(this)" onmouseout="AlternarImagen(this)" alt="Proyectos&nbsp;de&nbsp;Investigaci&oacute;n&nbsp;e&nbsp;Innovaciones" />',"/proyectos_investigacion","","","","_self","0", , , , , ],


];