function showPos()
{
    var divPos = document.getElementById("divPos");
    var divCom = document.getElementById("divCom");
    var btnPos = document.getElementById("btnPos");
    var btnCom = document.getElementById("btnCom");
    
    divPos.style.display = "";
    btnPos.className = "menu03";
    
    divCom.style.display = "none";
    btnCom.className = "menu04";
}

function showCom()
{
    var divPos = document.getElementById("divPos");
    var divCom = document.getElementById("divCom");
    var btnPos = document.getElementById("btnPos");
    var btnCom = document.getElementById("btnCom");
    
    divPos.style.display = "none";
    btnPos.className = "menu04";
    
    divCom.style.display = "";
    btnCom.className = "menu03";
}