window.onload = function adload()
{
	ret = adsize();
}
window.onscroll = function adscroll()
{
	ret = adsize();
}
function adsize()
{

document.getElementById("adbody").style.position = 'absolute'; 


haba = document.body.clientWidth;
takasa = document.body.clientHeight;

	hidari = document.getElementById("mainbody").offsetLeft;
	haba = document.getElementById("mainbody").offsetWidth;

	ichi = hidari + haba;

//	ue = document.body.scrollTop;
	ue = document.documentElement.scrollTop;

	document.getElementById("adbody").style.top = ue + 'px';
	document.getElementById("adbody").style.left = ichi + 'px';

	return;
}