preload1 = new Image(111,29);
preload2 = new Image(111,29);
preload3 = new Image(111,29);
preload1.src="/imagenes/menu-seleccionado.gif"; 
preload2.src="/imagenes/menu-resaltado.gif"; 
preload3.src="/imagenes/menu-normal.gif";

var VentanaZoom = null;

function ShowImage(imagen, x, y, scroll) {
 if (scroll == 1) { scrl = "yes"; } else { scrl = "no"; }  if (VentanaZoom == null) {
     VentanaZoom = window.open(imagen,"VentanaZoom","width="+x+",height="+y+",titlebar=0, resizable=1, scrollbars=" + scrl);
     UltimaImagen = imagen;
     VentanaZoom.focus();
  } else if (VentanaZoom.closed) {
     VentanaZoom = window.open(imagen,"VentanaZoom","width="+x+",height="+y+",titlebar=0, resizable=1, scrollbars=" + scrl);
     UltimaImagen = imagen;
     VentanaZoom.focus();
  } else {
     VentanaZoom.close();
     if (UltimaImagen != imagen) {;
       VentanaZoom = window.open(imagen,"VentanaZoom","width="+x+",height="+y+",titlebar=0, resizable=1, scrollbars=" + scrl);
       UltimaImagen = imagen;
       VentanaZoom.focus();
     } 
  }
}