function scrol() {
    if($('.go-top-container').length > 0) {
      $(window).scroll(function(e) {
        if($(window).scrollTop() >= 400) {
          $('.go-top-container').fadeIn('fast');
        } else {
          $('.go-top-container').hide();
        }
      });
    }

$('.go-top-container').click(function(){
        $('html, body').animate({scrollTop:0}, 'slow');

        return false;

    });



}







function switch_style(css_title){
    // You may use this script on your site free of charge provided
    // you do not remote this notice or the URL below. Script from
    // http://www.thesitewizard.com/javascripts/change-style-sheets.shtml
    var i, link_tag;
    for (i = 0, link_tag = document.getElementsByTagName("link"); i < link_tag.length; i++) {
        if ((link_tag[i].rel.indexOf("stylesheet") != -1) &&
        link_tag[i].title) {
            link_tag[i].disabled = true;
            if (link_tag[i].title == css_title) {
                link_tag[i].disabled = false;
            }
        }
        Set_Cookie('st', css_title, '', '/', '', '');
    }
    a = 'black'
    b = 'white'
    if (css_title == 'white') {
        document.getElementById('style').innerHTML = '<a href="JavaScript:switch_style(a)">contrast</a>';
    }
    else {
        document.getElementById('style').innerHTML = '<a href="JavaScript:switch_style(b)">contrast</a>';
    }
}





function Set_Cookie(name, value, expires, path, domain, secure){
    // set time, it's in milliseconds
    var today = new Date();
    today.setTime(today.getTime());
    
    /*
     if the expires variable is set, make the correct
     expires time, the current script below will set
     it for x number of days, to make it for hours,
     delete * 24, for minutes, delete * 60 * 24
     */
    if (expires) {
        expires = expires * 1000 * 60 * 60 * 24;
    }
    var expires_date = new Date(today.getTime() + (expires));
    
    document.cookie = name + "=" + escape(value) +
    ((expires) ? ";expires=" + expires_date.toGMTString() : "") +
    ((path) ? ";path=" + path : "") +
    ((domain) ? ";domain=" + domain : "") +
    ((secure) ? ";secure" : "");
}

function Get_Cookie(check_name){
    // first we'll split this cookie up into name/value pairs
    // note: document.cookie only returns name=value, not the other components
    var a_all_cookies = document.cookie.split(';');
    var a_temp_cookie = '';
    var cookie_name = '';
    var cookie_value = '';
    var b_cookie_found = false; // set boolean t/f default f
    for (i = 0; i < a_all_cookies.length; i++) {
        // now we'll split apart each name=value pair
        a_temp_cookie = a_all_cookies[i].split('=');
        
        
        // and trim left/right whitespace while we're at it
        cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');
        
        // if the extracted name matches passed check_name
        if (cookie_name == check_name) {
            b_cookie_found = true;
            // we need to handle case where cookie has no value but exists (no = sign, that is):
            if (a_temp_cookie.length > 1) {
                cookie_value = unescape(a_temp_cookie[1].replace(/^\s+|\s+$/g, ''));
            }
            // note that in cases where cookie is initialized but no value, null is returned
            return cookie_value;
            break;
        }
        a_temp_cookie = null;
        cookie_name = '';
    }
    if (!b_cookie_found) {
        return null;
    }
}