// WWW_file howdoi_nav.js, Version , Updated 2009-03-10 11:13:15

var opened = 0;

function showsub(divname,linkname){
    // hide all
    hidesubs();
    // show sub info
    document.getElementById(divname).style.visibility = "visible";
    document.getElementById(divname).style.height = "auto";
    document.getElementById(divname).className = "howdoi_sub_on";
    // change link state
    document.getElementById(linkname).className = "on";
    document.getElementById(linkname).href = "#";
    
    opened = divname.substring(7,8);
}

function hidesubs(){
    if(opened == 0) hidesub('howdoi_01','howdoi_0');
    if(opened == 1) hidesub('howdoi_11','howdoi_1');
    if(opened == 2) hidesub('howdoi_21','howdoi_2');
    if(opened == 3) hidesub('howdoi_31','howdoi_3');
    if(opened == 4) hidesub('howdoi_41','howdoi_4');
}

function hidesub(divname,linkname){
    // hide sub info
    document.getElementById(divname).style.visibility = "hidden";
    document.getElementById(divname).style.height = "0px";
    document.getElementById(divname).className = "howdoi_sub_off";
    // change link state
    document.getElementById(linkname).className = "off";
    document.getElementById(linkname).href = "javascript:showsub('" + divname + "','" + linkname + "')";
}