function writeLogoBlock(slogan, spacing) {

  if (typeof spacing === "undefined") { spacing = "17px"; }

  prefix = '\
      <div id="logoContainer">\
        <div id="logo">\
          <div id="slogan_top" style="letter-spacing: '

  infix = '"><span>\
      '

  suffix = '\
                  </span>\
          </div>\
        </div>\
        <!-- logo -->\
        <div id="socbutt">\
          <ul class="buttmenu">\
            <li><a class="vk" href="https://vk.com/id302897208" target="_blank"></a></li>\
            <li><a class="fb" href="http://www.facebook.com/HiAlgoBoost" target="_blank"></a></li>\
            <li><a class="gg" href="https://plus.google.com/b/106092790827345430355/" target="_blank"></a></li>\
            <li><a class="tw" href="http://twitter.com/HiAlgoBoost" target="_blank"></a></li>\
            <li><a class="ml" href="mailto:contact@hialgo.com"></a></li>\
          </ul>\
        </div>\
        <!-- socbutt -->\
      </div>\
      <!-- logoContainer -->\
      '

  document.write(prefix + spacing + infix + slogan + suffix)
}