function getPageSize(){
var xScroll, yScroll;
if (window.innerHeight && window.scrollMaxY) {	xScroll = document.body.scrollWidth;
yScroll = window.innerHeight + window.scrollMaxY;
} else if (document.body.scrollHeight > document.body.offsetHeight){
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else {
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
if (self.innerHeight) {	windowWidth = self.innerWidth;
windowHeight = self.innerHeight;
} else if (document.documentElement && document.documentElement.clientHeight) {
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else if (document.body) {
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}	if(yScroll < windowHeight){
pageHeight = windowHeight;
} else {
pageHeight = yScroll;
}
if(xScroll < windowWidth){	pageWidth = windowWidth;
} else {
pageWidth = xScroll;
}
arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
}
var timer;
function bodyOverlay() {
var objBody = document.getElementsByTagName('body').item(0);
var sizesPage = getPageSize();
var bodyOverlay = document.createElement("div");
bodyOverlay.setAttribute('id','bodyOverlay');
bodyOverlay.style.height = arrayPageSize[1] + 'px';
if (!document.getElementById('bodyOverlay')) {
objBody.insertBefore(bodyOverlay, objBody.firstChild);
}
timer = window.setInterval('removerOverlay()',1000000);
}
function removerOverlay() {
clearInterval(timer);
var bodyOverlay = document.getElementById('bodyOverlay');
if (bodyOverlay) {
bodyOverlay.parentNode.removeChild(bodyOverlay);
}
}