// JavaScript Document
function openWindow(url,nombre){
	var WindowObjectReference;
	WindowObjectReference = window.open(url,nombre,"width=900,height=700,left=150,top=2,screenX=10,screenY=100,resizable=yes,status=yes,toolbar=yes,menubar=yes,location=yes");
	}

function changeimg(obj){
		document.getElementById("regresa").src = "img/return_u.png";
}
function originalimg(obj){
		document.getElementById("regresa").src = "img/return.png";
}