function FontSize(nm) {
	var id = document.getElementById('contentsArea');
	var fontimg1 = document.getElementById('fontmenus1');
	var fontimg2 = document.getElementById('fontmenus2');
	var fontimg3 = document.getElementById('fontmenus3');
	if (!nm) {
		a = document.cookie.split("; ");
		for(i=0; i<a.length; i++) {
			b = a[i].split("=");
			if ( b[0].match("Fsize") ) { nm = b[1]; }
		}
		if (nm) {
			id.style.fontSize = nm;
			if(document.getElementById('fontmenus2')){
				if( nm == '116.7%' ){
					fontimg1.setAttribute("src", fontimg1.getAttribute("src").replace("_natural.", "_select."));
				}else if( nm == '133.4%' ){
					fontimg2.setAttribute("src", fontimg2.getAttribute("src").replace("_natural.", "_select."));
				}else if( nm == '150%' ){
					fontimg3.setAttribute("src", fontimg3.getAttribute("src").replace("_natural.", "_select."));
				}
			}
		} else {
			fontimg2.setAttribute("src", fontimg2.getAttribute("src").replace("_natural.", "_select."));
			id.style.fontSize = '133.4%';
			setCookie("Fsize","133.4%");
		}
	} else {
		if( nm == '116.7%' ){
			fontimg1.setAttribute("src", fontimg1.getAttribute("src").replace("_natural.", "_select."));
			fontimg2.setAttribute("src", fontimg2.getAttribute("src").replace("_select.", "_natural."));
			fontimg3.setAttribute("src", fontimg3.getAttribute("src").replace("_select.", "_natural."));
			
		}else if( nm == '133.4%' ){
			fontimg1.setAttribute("src", fontimg1.getAttribute("src").replace("_select.", "_natural."));
			fontimg2.setAttribute("src", fontimg2.getAttribute("src").replace("_natural.", "_select."));
			fontimg3.setAttribute("src", fontimg3.getAttribute("src").replace("_select.", "_natural."));
			
		}else if( nm == '150%' ){
			fontimg1.setAttribute("src", fontimg1.getAttribute("src").replace("_select.", "_natural."));
			fontimg2.setAttribute("src", fontimg2.getAttribute("src").replace("_select.", "_natural."));
			fontimg3.setAttribute("src", fontimg3.getAttribute("src").replace("_natural.", "_select."));	
		}
		setCookie("Fsize",nm);
		id.style.fontSize = nm;
		return false;
	}
}

function setCookie(key, val) {
	tmp = key + "=" + val + "; path=/; ";
	document.cookie = tmp;
}