/***************************************************************************
Funçao para pegar a QueryString da url
***************************************************************************/
function getQueryString()
{
    var qs = window.location.search.substring(1).split('&');

    for (var i = 0; i < qs.length; i++) {
        qs[i] = qs[i].split('=');
    }

    return qs;
}


/***************************************************************************
Url decode
***************************************************************************/
function urldecode(url) {
  // Create a regular expression to search all +s in the string
  var lsRegExp = /\+/g;
  // Return the decoded string
  return unescape(String(url).replace(lsRegExp, " "));	
}

var queryString = getQueryString();
var msg = "";

/**************************************************************************
Varre as query strings para ver se tem a tag "msg"
***************************************************************************/
for (var i = 0; i < queryString.length; i++) {
	if (queryString[i][0] == 'msg') {
		msg += urldecode(queryString[i][1]);
	}
}

/***************************************************************************
Se existir a tag "msg" entao exibe a mensagem
***************************************************************************/
if (msg != '') {
    alert(msg);	
}