function showhide() {
  if (document.getElementById("ptype").value != "3") {
    document.getElementById("shohide_1").style.display = ""
    document.getElementById("shohide_2").style.display = ""
    document.getElementById("hidesho_1").style.display = "none"
    document.getElementById("hidesho_2").style.display = "none"
    document.getElementById("shohide_3").style.display = ""
    document.getElementById("shohide_4").style.display = ""
    document.getElementById("shohide_5").style.display = ""
    window.focus()
  } else {
    document.getElementById("shohide_1").style.display = "none"
    document.getElementById("shohide_2").style.display = "none"
    document.getElementById("hidesho_1").style.display = ""
    document.getElementById("hidesho_2").style.display = ""
    document.getElementById("shohide_3").style.display = "none"
    document.getElementById("shohide_4").style.display = "none"
    document.getElementById("shohide_5").style.display = "none"
    window.focus()
  }
}