var userAgent = navigator.userAgent.toLowerCase();
var browser_version = (userAgent.match( /.+(?:rv|it|ra|ie|me)[\/: ]([\d.]+)/ ) || [])[1];
var is_chrome = /chrome/.test( userAgent );
var is_safari = /webkit/.test( userAgent ) && !/chrome/.test( userAgent );
var is_opera = /opera/.test( userAgent );
var is_msie = /msie/.test( userAgent ) && !/opera/.test( userAgent );
var is_mozilla = /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent );

function setTitleLoc() {
  if (is_msie) {
    document.getElementById("title_ssdb").style.marginTop = "100px";
    document.getElementById("title_startrek").style.marginTop = "100px";
    document.getElementById("title_bsg").style.marginTop = "100px";
    document.getElementById("title_b5").style.marginTop = "100px";
    document.getElementById("title_yamato").style.marginTop = "100px";
    document.getElementById("title_ssdb").style.marginLeft = "220px";
    document.getElementById("title_startrek").style.marginLeft = "220px";
    document.getElementById("title_bsg").style.marginLeft = "220px";
    document.getElementById("title_b5").style.marginLeft = "220px";
    document.getElementById("title_yamato").style.marginLeft = "220px";
  } else {
    document.getElementById("title_ssdb").style.marginTop = "105px";
    document.getElementById("title_startrek").style.marginTop = "100px";
    document.getElementById("title_bsg").style.marginTop = "100px";
    document.getElementById("title_b5").style.marginTop = "95px";
    document.getElementById("title_yamato").style.marginTop = "95px";
    document.getElementById("title_ssdb").style.marginLeft = "485px";
    document.getElementById("title_startrek").style.marginLeft = "500px";
    document.getElementById("title_bsg").style.marginLeft = "480px";
    document.getElementById("title_b5").style.marginLeft = "470px";
    document.getElementById("title_yamato").style.marginLeft = "450px";
  }
  switchDiv("title_ssdb");
}

function switchDiv(divLayer) {
  document.getElementById("title_ssdb").style.display = "none";
  document.getElementById("title_startrek").style.display = "none";
  document.getElementById("title_bsg").style.display = "none";
  document.getElementById("title_b5").style.display = "none";
  document.getElementById("title_yamato").style.display = "none";
  document.getElementById(divLayer).style.display = "block";
}