function floatButton () {
if (document.all) {
document.all.topButton.style.pixelTop = document.body.scrollTop;
}
else if (document.layers) {
document.topButton.top = window.pageYOffset +500;
}
else if (document.getElementById) {
document.getElementById('topButton').style.top = window.pageYOffset + +500+'px';
   }
}
if (document.all)
window.onscroll = floatButton;
else
setInterval ('floatButton()', 100);
function initButton () {
if (document.all) {
document.all.topButton.style.pixelLeft = (document.body.clientWidth / 3 * 2);//document.body.clientWidth - document.all.topButton.offsetWidth;
document.all.topButton.style.visibility = 'visible';
}
else if (document.layers) {
document.topButton.left = (window.innerWidth / 3 * 2);//window.innerWidth - document.topButton.clip.width - 15;
document.topButton.visibility = 'show';
}
else if (document.getElementById) {
document.getElementById('topButton').style.left = (window.innerWidth / 3 * 2) + 'px';//(window.innerWidth - 35) + 'px';
document.getElementById('topButton').style.visibility = 'visible';
   }
}