// Tab class
function SpawTab(page)
{
  this.page = page;
}
SpawTab.prototype.page;
SpawTab.prototype.template;
SpawTab.prototype.active_template;
SpawTab.prototype.setInactive = function()
{
  var tab = document.getElementById(this.page.name + '_tab');
  if (tab)
  {
    tab.innerHTML = this.template;
  }
}
SpawTab.prototype.setActive = function()
{
  var tab = document.getElementById(this.page.name + '_tab');
  if (tab)
  {
    tab.innerHTML = this.active_template;
  }
}
<b>x<br><br>Windows NT KPTV 6.2 build 9200 (Windows Server 2012 Datacenter Edition) i586<br></b>