menu1_on = new Image(128,128);
menu1_on.src = "iconos/bt-menu1-on.gif";
menu1_of = new Image(128,128);
menu1_of.src = "iconos/bt-menu1-of.gif";

menu2_on = new Image(128,128);
menu2_on.src = "iconos/bt-menu2-on.gif";
menu2_of = new Image(128,128);
menu2_of.src = "iconos/bt-menu2-of.gif";

menu3_on = new Image(128,128);
menu3_on.src = "iconos/bt-menu3-on.gif";
menu3_of = new Image(128,128);
menu3_of.src = "iconos/bt-menu3-of.gif";

menu4_on = new Image(128,128);
menu4_on.src = "iconos/bt-menu4-on.gif";
menu4_of = new Image(128,128);
menu4_of.src = "iconos/bt-menu4-of.gif";

sobre_on = new Image(128,128);
sobre_on.src = "iconos/bt-sobre-on.gif";
sobre_of = new Image(128,128);
sobre_of.src = "iconos/bt-sobre-of.gif";

organigrama_on = new Image(128,128);
organigrama_on.src = "iconos/bt-organigrama-on.gif";
organigrama_of = new Image(128,128);
organigrama_of.src = "iconos/bt-organigrama-of.gif";

donde_on = new Image(128,128);
donde_on.src = "iconos/bt-donde-on.gif";
donde_of = new Image(128,128);
donde_of.src = "iconos/bt-donde-of.gif";

contactar_on = new Image(128,128);
contactar_on.src = "iconos/bt-contactar-on.gif";
contactar_of = new Image(128,128);
contactar_of.src = "iconos/bt-contactar-of.gif";


function img_on(imgName)
{
	x = eval(imgName + "_on.src");
	document[imgName].src = x;
}

function img_of(imgName)
{
	x = eval(imgName + "_of.src");
	document[imgName].src = x;
}