/*
residentsubdiv
currentsubdiv

OVER = show
*/
var residentsubdiv = "none";
var subtimeout	= 500;
var subclosetimer	= 0;

function submclose2(){ 
document.getElementById('sub-nav-chapter1').style.display = 'none';
document.getElementById('sub-nav-chapter2').style.display = 'none';
document.getElementById('sub-nav-chapter3').style.display = 'none';
document.getElementById('sub-nav-chapter4').style.display = 'none';
document.getElementById('sub-nav-chapter5').style.display = 'none';
document.getElementById('sub-nav-chapter6').style.display = 'none';
}

function submclose(){ 
submclose2();
if(residentsubdiv!="none"){ slidedown(residentsubdiv); }
}

function subnav_mclosetime() { if(residentsubdiv!="none"){ if(document.getElementById(residentsubdiv).style.display!='block'){ subclosetimer = window.setTimeout(submclose, subtimeout); } }else{ subclosetimer = window.setTimeout(submclose, subtimeout); } }

function subnav_mcancelclosetime(){
if(subclosetimer){ window.clearTimeout(subclosetimer); subclosetimer = null; }
}

function makeresidentsubdiv(id){
document.getElementById(id).style.display = 'block';
residentsubdiv = id;
}


function showsubnav(currentsubdiv){
subnav_mcancelclosetime();
submclose2();
slidedown(currentsubdiv);
}



var timerlen = 5;
var slideAniLen = 250;

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();

function slidedown(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display != "none")
                return; // cannot slide down something that is already visible

        moving[objname] = true;
        dir[objname] = "down";
        startslide(objname);
}

function slideup(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display == "none")
                return; // cannot slide up something that is already hidden

        moving[objname] = true;
        dir[objname] = "up";
        startslide(objname);
}

function startslide(objname){
        obj[objname] = document.getElementById(objname);

        endHeight[objname] = parseInt(obj[objname].style.height);
        startTime[objname] = (new Date()).getTime();

        if(dir[objname] == "down"){
                obj[objname].style.height = "1px";
        }

        obj[objname].style.display = "block";

        timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
}

function slidetick(objname){
        var elapsed = (new Date()).getTime() - startTime[objname];

        if (elapsed > slideAniLen)
                endSlide(objname)
        else {
                var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
                if(dir[objname] == "up")
                        d = endHeight[objname] - d;

                obj[objname].style.height = d + "px";
        }

        return;
}

function endSlide(objname){
        clearInterval(timerID[objname]);

        if(dir[objname] == "up")
                obj[objname].style.display = "none";

        obj[objname].style.height = endHeight[objname] + "px";

        delete(moving[objname]);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
}



function toggleSlide(mtg) {
var e = document.getElementById(mtg);
if(e.style.display == 'none')
e.style.display = 'block';
else
e.style.display = 'none';
}


function togglexxxSlide(objname){
  if(document.getElementById(objname).style.display == "none"){
    // div is hidden, so let's slide down
    slidedown(objname);
  }else{
    // div is not hidden, so slide up
    slideup(objname);
  }
}