function hppcShowTab(){
    var tabNum;
    var tabDiv;
    var tabMax = 3;
    var cName = "hppctab";
    var expires = new Date();
    
    if (cookieRead(cName) == ""){
        tabNum = 1;
    } else {
        tabNum = parseInt(cookieRead(cName));
        if (isNaN(tabNum)){
            tabNum = 1;
        }
    }
    tabDiv = document.getElementById("hppcTab" + tabNum);
    if (tabDiv != null){
        tabDiv.style.display = "block";
    }
    
    tabNum++;
    if (tabNum > tabMax){
        tabNum = 1;
    }
    
    expires.setFullYear(expires.getFullYear() + 1);
    cookieWriteFull(cName, tabNum, expires);
}

hppcShowTab();