function FontSize(nm) {
	var id = document.getElementById('maincontents');
	var ieid = document.getElementById('fcarea');
	var bnavi = window.navigator.userAgent;
	if (!nm) {
		nm = document.cookie.match(/\d*%/g);
		if (nm) {
			id.style.fontSize = nm;
		} else {
			id.style.fontSize = '100%';
			setCookie("Fsize","100%");
		}
	} else {
		setCookie("Fsize",nm);
		id.style.fontSize = nm;
		return false;
	}
	if(( bnavi.lastIndexOf('MSIE 6.0') != -1 )&&(ieid != null)){
		ieid.style.fontSize = '100%';
	}
}
function setCookie(key, val) {
	tmp = key + "=" + val + "; path=/; ";
	document.cookie = tmp;
}