var timer;
var h = -450;
var w = 400;
var t = 100;

function startAp() {
setLeft();
showAp();
}

function hideAp() {
if (document.layers) document.layers.pa.visibility = 'hide';
else if (document.all) document.all.pa.style.visibility = 'hidden';
else if (document.getElementById) document.getElementById("pa").style.visibility = 'hidden';
}

function showAp() {
state=typeof tPos;
if(state=='undefined') tPos = h;
if(tPos < t) {
tPos+=25;
if (document.layers) document.layers.pa.top = tPos+"px";
else if (document.all) document.all.pa.style.top = tPos+"px";
else if (document.getElementById) document.getElementById("pa").style.top = tPos+"px";
}

if(timer!=null) clearInterval(timer);
timer = setTimeout("showAp()",10);
}

function getoPos() {
if (document.layers) alert(document.layers.pa.top);
else if (document.all) alert(document.all.pa.style.top);
else if (document.getElementById) alert(document.getElementById("pa").style.top);
}

function setLeft() {
if (document.layers) document.layers.pa.left = ((window.innerWidth / 2) - (w / 2))+"px";
else if (document.all) document.all.pa.style.left = ((document.body.offsetWidth / 2) - (w / 2))+"px";
else if (document.getElementById) document.getElementById("pa").style.left = ((window.innerWidth / 2) - (w / 2))+"px";
}