function swapRaceUnits(race) {
  var aktelem = race  + "_unit_list";
  var aktlogo = race  + "_logo";
  document.getElementById("terraner_unit_list").style.display = "none";
  document.getElementById("terraner_logo").style.backgroundPosition = "0 top";
  document.getElementById("protoss_unit_list").style.display = "none";
  document.getElementById("protoss_logo").style.backgroundPosition = "0 top";
  document.getElementById("zerg_unit_list").style.display = "none";
  document.getElementById("zerg_logo").style.backgroundPosition = "0 top";
  document.getElementById(aktelem).style.display = "block";
  document.getElementById(aktlogo).style.backgroundPosition = "0 bottom";
}

function swapRaceBuildings(race) {
  var aktelem = race  + "_bld_list";
  var aktlogo = race  + "b_logo";
  document.getElementById("terraner_bld_list").style.display = "none";
  document.getElementById("terranerb_logo").style.backgroundPosition = "0 top";
  document.getElementById("protoss_bld_list").style.display = "none";
  document.getElementById("protossb_logo").style.backgroundPosition = "0 top";
  document.getElementById("zerg_bld_list").style.display = "none";
  document.getElementById("zergb_logo").style.backgroundPosition = "0 top";
  document.getElementById(aktelem).style.display = "block";
  document.getElementById(aktlogo).style.backgroundPosition = "0 bottom";
}

function swapTechTrees(race) {
  var aktelem = race  + "_bld_tree";
  var aktlogo = race  + "t_logo";
  document.getElementById("terraner_bld_tree").style.display = "none";
  document.getElementById("terranert_logo").style.backgroundPosition = "0 top";
  document.getElementById("protoss_bld_tree").style.display = "none";
  document.getElementById("protosst_logo").style.backgroundPosition = "0 top";
  document.getElementById("zerg_bld_tree").style.display = "none";
  document.getElementById("zergt_logo").style.backgroundPosition = "0 top";
  document.getElementById(aktelem).style.display = "block";
  document.getElementById(aktlogo).style.backgroundPosition = "0 bottom";
}