// JavaScript Document
function setcenter()
{
	imgObj = document.images["BTN"];
	iW = imgObj.width;	//　画像の横幅
	iH = imgObj.height;	//画像の縦幅
	wW = document.body.clientWidth;	//　ウィンドウの横幅
	wH = document.body.clientHeight;	//　ウィンドウの縦幅
	cx = (wW - iW) / 2;
	cy = (wH - iH) / 2;
	imgObj.style.left = cx;
	imgObj.style.top = cy;
}

//-->