var lang;
if(document.cookie.indexOf("lang=es") >= 0) lang = "es";
if(document.cookie.indexOf("lang=en") >= 0) lang = "en";
if(document.cookie.indexOf("lang=pt") >= 0) lang = "pt";

var vers;
if(document.cookie.indexOf("vers=html") >= 0) vers = "html";

// name - name of the cookie
// value - value of the cookie
// [expires] - expiration date of the cookie (defaults to end of current session)
// [path] - path for which the cookie is valid (defaults to path of calling document)
// [domain] - domain for which the cookie is valid (defaults to domain of calling document)
// [secure] - Boolean value indicating if the cookie transmission requires a secure transmission
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments
function setCookie(name, value, expirar) {
	var secure;
	var domain;
	var path = "/";
	var expires;
	if (expirar == "1") expires = "Monday, 25-Apr-2011 23:12:40 GMT";
	var curCookie = name + "=" + escape(value) +
		((expires) ? "; expires=" + expires : "") +
		((path)    ? "; path="    + path    : "") +
		((domain)  ? "; domain="  + domain  : "") +
		((secure)  ? "; secure"             : "");
	document.cookie = curCookie;
}

// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist
function getCookie(name) {
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	if (begin == -1) {
		begin = dc.indexOf(prefix);
		if (begin != 0) return null;
	} else begin += 2;
	var end = document.cookie.indexOf(";", begin);
	if (end == -1)
	end = dc.length;
	return unescape(dc.substring(begin + prefix.length, end));
}


function get_url_var(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return unescape(pair[1]);
    }
  }
  return "";
}