function changeMenu(e, obj) 
{
    if (!e) var e = window.event;
    if(isMouseLeaveOrEnter(e, obj))
    {
        var nr = obj.className.substring(obj.className.length-1);
        
        if (obj.className == "menu menu" + nr)
        {
            obj.className = "menu menufocus" + nr;
        }
        else if (obj.className == "menu menufocus" + nr)
        {
            obj.className = "menu menu" + nr;
        }
        else if (obj.className == "menu menusel" + nr)
        {
            obj.className = "menu menuselfocus" + nr;
        }
        else if (obj.className == "menu menuselfocus" + nr)
        {
            obj.className = "menu menusel" + nr;
        }
    }
}

function isMouseLeaveOrEnter(e, handler) 
{ 
    if (e.type != 'mouseout' && e.type != 'mouseover') 
        return false; 
    var reltg = e.relatedTarget ? e.relatedTarget : e.type == 'mouseout' ? e.toElement : e.fromElement; 
    while (reltg && reltg != handler) 
        reltg = reltg.parentNode; 
    return (reltg != handler); 
}

function hideDiv(id)
{
    document.getElementById(id).style.visibility = 'hidden';
}

function showDiv(id)
{
    document.getElementById(id).style.visibility = 'visible';
}

function setImgSrc(id, image)
{
    document.getElementById(id).src = image;
}

function setImage(id, image)
{
    document.getElementById(id).style.backgroundImage = 'url('+image+')';
    document.getElementById(id).style.backgroundRepeat = 'no-repeat';
}

function setImageByLanguage(id, path, image)
{
    var language = getLanguage();
    setImage(id, path + language + '_' +image);
}

function getLanguage()
{
    var language = readCookie('synergy_language');
    if (language == null || language == 'sv')
        return 'sv';
    return 'en';
}

function setLanguage(language)
{
    createCookie('synergy_language', language, 365);
    if (language == 'en')
    {
        document.getElementById('english').style.backgroundImage = 'url(imgs/start/english_transparent.gif)';
        document.getElementById('english').style.backgroundRepeat = 'no-repeat';
        document.getElementById('swedish').style.backgroundImage = 'url(imgs/start/swedish_unselected.gif)';
        document.getElementById('swedish').style.backgroundRepeat = 'no-repeat';
    }
    else
    {
        document.getElementById('english').style.backgroundImage = 'url(imgs/start/english_unselected.gif)';
        document.getElementById('english').style.backgroundRepeat = 'no-repeat';
        document.getElementById('swedish').style.backgroundImage = 'url(imgs/start/swedish_transparent.gif)';
        document.getElementById('swedish').style.backgroundRepeat = 'no-repeat';
    }
}

function setLanguageFlags()
{
    var language = getLanguage();
    setLanguage(language);
}

function createCookie(name, value, days) 
{
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) 
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) 
{
	createCookie(name,"",-1);
}