// JavaScript Document
boton1on = new Image();
boton1on.src = "graficos/boton1on.jpg";
boton1off = new Image();
boton1off.src="graficos/boton1.jpg";

boton2on = new Image();
boton2on.src = "graficos/boton2on.jpg";
boton2off = new Image();
boton2off.src="graficos/boton2.jpg";

boton3on = new Image();
boton3on.src = "graficos/boton3on.jpg";
boton3off = new Image();
boton3off.src="graficos/boton3.jpg";

boton4on = new Image();
boton4on.src = "graficos/boton4on.jpg";
boton4off = new Image();
boton4off.src="graficos/boton4.jpg";

function img_activa(imgName) {
		imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
		}


function img_inactiva(imgName) {
		imgOff = eval(imgName + "off.src");
		document [imgName].src = imgOff;
		}