// Imágenes de sustitución
if (document.images) {  
	image1on = new Image();  
	image1on.src = "imagenes/ite_1.gif";  
	image2on = new Image();  
	image2on.src = "imagenes/areas_1.gif";
	image3on = new Image();  
	image3on.src = "imagenes/servicio_1.gif"; 
	image4on = new Image();  
	image4on.src = "imagenes/formacion_1.gif";  
	image5on = new Image(); 
	image5on.src = "imagenes/investig_1.gif"; 
	image6on = new Image();
	image6on.src = "imagenes/asociado_1.gif";  
	image7on = new Image();  
	image7on.src = "imagenes/publica_1.gif";
    image8on = new Image();  
	image8on.src = "imagenes/infor_1.gif";    
	image1off = new Image();  
	image1off.src = "imagenes/ite_0.gif";
	image2off = new Image();  
	image2off.src = "imagenes/areas_0.gif";  
	image3off = new Image();  
	image3off.src = "imagenes/servicio_0.gif";    
	image4off = new Image();  
	image4off.src = "imagenes/formacion_0.gif"; 
	image5off = new Image();  
	image5off.src = "imagenes/investig_0.gif"; 
	image6off = new Image();  
	image6off.src = "imagenes/asociado_0.gif"; 
	image7off = new Image();  
	image7off.src = "imagenes/publica_0.gif"; 
	image8off = new Image();  
	image8off.src = "imagenes/infor_0.gif"; 
}
function turnOn(imageName) {  
	if (document.images) {    
		document[imageName].src = eval(imageName + "on.src");  
	}
}
function turnOff(imageName) {  
	if (document.images) {    
		document[imageName].src = eval(imageName + "off.src");  
	}
}