function popup(theURL,winName,features) {
	var base = document.getElementsByTagName("base")[0].getAttribute("href");
	window.open(base + theURL, winName, features);
}

function to(url) {
	var base = document.getElementsByTagName("base")[0].getAttribute("href");
	popup(url,'new','');
	//document.location.href=base + url;
}

function go(url) {
	var base = document.getElementsByTagName("base")[0].getAttribute("href");
	document.location.href=base + url;
}

function swap(_img, _new) {
	_img.src = _new.src;
}

var img_register = new Image();
img_register.src = "images/but/estab_reg.gif";

var img_register_a = new Image();
img_register_a.src = "images/but/estab_rega.gif";


var img_login = new Image();
img_login.src = "images/but/estab_login.gif";

var img_login_a = new Image();
img_login_a.src = "images/but/estab_logina.gif";