if (document.images) {
     button1 = new Image
     button2 = new Image
	 button3 = new Image
     button4 = new Image

     button1.src = 'http://www.dcsmexico.com/spanish/imagenes/menu06.gif'
     button2.src = 'http://www.dcsmexico.com/spanish/imagenes/menu06on.gif'
	 button3.src = 'http://www.dcsmexico.com/english/imagenes/menu06.gif'
     button4.src = 'http://www.dcsmexico.com/english/imagenes/menu06on.gif'
}