if (readCookie('lang') == 'cs') {
        setlang('cs');
}
if (readCookie('lang') == 'en') {
        setlang('en');
}
if (readCookie('lang') == 'both') {
        setlang('both');
}

function setlang(slang) {
	if (slang == "en") {
		createCookie('lang','en',300);
		addCssFile("/english.css");
	}
	if (slang == "cs") {
		createCookie('lang','cs',300);
		addCssFile("/czech.css");
        }
        if (slang == "cz") {
                createCookie('lang','cs',300);
                addCssFile("/czech.css");
	}
	if (slang == "both") {
		createCookie('lang','both',300);
		addCssFile("/both.css");
	}
}
function addCssFile(css) {
var styleElement = document.createElement("link");
styleElement.type = "text/css";
styleElement.rel="stylesheet";
styleElement.href = css;
document.getElementsByTagName("head")[0].appendChild(styleElement);
}
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;
}