// Cookie handling 
var Cookie =
{
    read: function (name)
    {
        var arrCookies = document.cookie.split ('; ');
        for (var i=0; i<arrCookies.length; i++)
        {
            var arrCookie = arrCookies[i].split ('=');
            
            if (arrCookie[0] == name)
            {
                return decodeURIComponent (arrCookie[1]);
            }
        }
        return false;
    },

    write: function (name, value, expires, path)
    {
        if (expires)
        {
            var date = new Date ();
            date.setTime (date.getTime () + (((((expires * 24) * 60) * 60) * 1000)));
            expires = '; expires=' + date.toGMTString ();
        }
        else expires = '';

        if (!path) path = '/';

        document.cookie = name+'='+encodeURIComponent (value)+expires+'; path='+path;
    },

    remove: function (name)
    {
        this.write (name, '', -1);
    }
}

// Detects if can set a cookie in the browser
function browserSupportsCookies()
{
    Cookie.write('cookiesEnabled', 1);
    var boolCookiesEnabled = Cookie.read('cookiesEnabled');
    Cookie.remove('cookiesEnabled');
    if (boolCookiesEnabled != 1)
    {
        return false;
    }
    return true;
}

// Detects if the browser supports Ajax 
function browserSupportsAjax()
{
    if (typeof XMLHttpRequest == "undefined" && typeof ActiveXObject == "undefined" && window.createRequest == "undefined")
    {
        return false;
    }
    return true
}

// Detects if the browser can use ActiveX if necessary
function ActiveXEnabledOrUnnecessary ()
{
    if (typeof ActiveXObject != "undefined")
    {
        var xhr = null;
        try{
            xhr=new ActiveXObject("Msxml2.XMLHTTP");
        }catch (e){
            try{
                xhr=new ActiveXObject("Microsoft.XMLHTTP");
            }catch (e2){
                try{
                    xhr=new ActiveXObject("Msxml2.XMLHTTP.4.0");
                }catch (e3){
                    xhr=null;
                }
            }
        }
        if (xhr == null)
        {
            return false
        }
    }
    
    return true;
}

function realizaTestePermissaoVoto(btnVotar){
	btnVotar.disabled = true;
	if (!browserSupportsCookies()){
		alert('Para votar, ative os cookies.');
		btnVotar.disabled = false;
	}else if (!browserSupportsAjax()){
		alert('Seu navegador não tem suporte para Ajax.')
		btnVotar.disabled = false;
	}
	return btnVotar.disabled;
}

function realizaTestePermissaoSugestao(btnEnvia){
	btnEnvia.disabled = true;
	if (!browserSupportsAjax()){
		alert('Seu navegador não tem suporte para Ajax.')
		btnEnvia.disabled = false;
	}
	return btnEnvia.disabled;
}