// precarga de imágenes:
if (document.images) {
b_tabla1 = new Image(175,20); b_tabla1.src = "imagenes/tabla.GIF";
b_tabla2 = new Image(175,20); b_tabla2.src = "imagenes/tablaover.GIF";

b_dewsolver1 = new Image(175,20); b_dewsolver1.src = "imagenes/Prod1.GIF";
b_dewsolver2 = new Image(175,20); b_dewsolver2.src = "imagenes/Prod1over.GIF";

b_gflow1 = new Image(175,20); b_gflow1.src = "imagenes/Prod2.GIF";
b_gflow2 = new Image(175,20); b_gflow2.src = "imagenes/Prod2over.GIF";

b_zgas1 = new Image(175,20); b_zgas1.src = "imagenes/Prod3.GIF";
b_zgas2 = new Image(175,20); b_zgas2.src = "imagenes/Prod3over.GIF";

b_simul1 = new Image(175,20); b_simul1.src = "imagenes/Prod4.GIF";
b_simul2 = new Image(175,20); b_simul2.src = "imagenes/Prod4over.GIF";

b_volum1 = new Image(175,20); b_volum1.src = "imagenes/Prod5.GIF";
b_volum2 = new Image(175,20); b_volum2.src = "imagenes/Prod5over.GIF";

b_dsactx1 = new Image(175,20); b_dsactx1.src = "imagenes/Comp1.GIF";
b_dsactx2 = new Image(175,20); b_dsactx2.src = "imagenes/Comp1over.GIF";

b_gfcom1 = new Image(175,20); b_gfcom1.src = "imagenes/Comp2.GIF";
b_gfcom2 = new Image(175,20); b_gfcom2.src = "imagenes/Comp2over.GIF";

b_zgcom1 = new Image(175,20); b_zgcom1.src = "imagenes/Comp3.GIF";
b_zgcom2 = new Image(175,20); b_zgcom2.src = "imagenes/Comp3over.GIF";

b_ngs1 = new Image(175,20); b_ngs1.src = "imagenes/Comp4.GIF";
b_ngs2 = new Image(175,20); b_ngs2.src = "imagenes/Comp4over.GIF";

b_licencia1 = new Image(175,20); b_licencia1.src = "imagenes/licencia.GIF";
b_licencia2 = new Image(175,20); b_licencia2.src = "imagenes/licenciaover.GIF";

b_descargas1 = new Image(175,20); b_descargas1.src = "imagenes/descargas.GIF";
b_descargas2 = new Image(175,20); b_descargas2.src = "imagenes/descargasover.GIF";

b_venta1 = new Image(175,20); b_venta1.src = "imagenes/venta.GIF";
b_venta2 = new Image(175,20); b_venta2.src = "imagenes/ventaover.GIF";

b_asist1 = new Image(175,20); b_asist1.src = "imagenes/asistencia.GIF";
b_asist2 = new Image(175,20); b_asist2.src = "imagenes/asistenciaover.GIF";

b_somos1 = new Image(175,20); b_somos1.src = "imagenes/Empr1.GIF";
b_somos2 = new Image(175,20); b_somos2.src = "imagenes/Empr1over.GIF";

b_cli1 = new Image(175,20); b_cli1.src = "imagenes/Empr2.GIF";
b_cli2 = new Image(175,20); b_cli2.src = "imagenes/Empr2over.GIF";

b_cont1 = new Image(175,20); b_cont1.src = "imagenes/Empr3.GIF";
b_cont2 = new Image(175,20); b_cont2.src = "imagenes/Empr3over.GIF";

b_links1 = new Image(175,20); b_links1.src = "imagenes/vinculos.GIF";
b_links2 = new Image(175,20); b_links2.src = "imagenes/vinculosover.GIF";
}