function abrir(x,y,z,t) {
	ven = open(x,"popup","width="+y+",height="+z+",top=10,left=10,screenX=10,screenY=10,status=no,toolbar=no,menubar=no,scrollbars="+t+",resizable=no");
}

function abrir2(x,y,z,t) {
	ven = open(x,"ampliacion","width="+y+",height="+z+",top=10,left=10,screenX=10,screenY=10,status=no,toolbar=no,menubar=no,scrollbars="+t+",resizable=no");
}

function ampliar_01() {
	ven = open("agradecimientos.htm","01_default","width=550,height=220,status=no,toolbar=no,menubar=no,scrollbars=no");
}
function ampliar_02() {
	ven = open("presentacion.htm","01_default","width=550,height=450,status=no,toolbar=no,menubar=no,scrollbars=yes");
}
function ampliar_03() {
	ven = open("introduccion.htm","01_default","width=550,height=350,status=no,toolbar=no,menubar=no,scrollbars=yes");
}

function ampliar_04() {
	ven = open("video.htm","01_default","width=630,height=300,status=no,toolbar=no,menubar=no,scrollbars=yes");
}

function ampliar_05() {
	ven = open("exposicion/circo.htm","exposicion","width=760,height=500,top=10,left=10,screenX=10,screenY=10,status=no,toolbar=no,menubar=no,scrollbars=yes");
}

function notas(enlace) {
	ven = open(enlace,"04_default","width=400,height=250,status=no,toolbar=no,menubar=no,scrollbars=yes");
	ven.focus();
}

function expo() {
	ven = open("expo/expo.htm","exposicion","width=730,height=455,top=10,left=10,screenX=10,screenY=10,status=no,toolbar=no,menubar=no,scrollbars=no");
}

function fecha(){
	var d=new Date();
	var f = d.getFullYear();
		if (f > 2005) {
			ff = "2005-" + f; 
			return ff;
		} else {
			return f;
		}
}