if (document.images) {
	var s_off = new Image(); s_off.src = '/images/text_small.gif';
	var s_on  = new Image(); s_on.src  = '/images/text_small_o.gif';
	var m_off = new Image(); m_off.src = '/images/text_middle.gif';
	var m_on  = new Image(); m_on.src  = '/images/text_middle_o.gif';
	var l_off = new Image(); l_off.src = '/images/text_large.gif';
	var l_on  = new Image(); l_on.src  = '/images/text_large_o.gif';
}

function setFont(f_type) {
	if(f_type == "f_m"){
		document.images["s_img"].src = s_off.src;
		document.images["m_img"].src = m_on.src;
		document.images["l_img"].src = l_off.src;
		setMidFont();
	}else if(f_type == "f_l"){
		document.images["s_img"].src = s_off.src;
		document.images["m_img"].src = m_off.src;
		document.images["l_img"].src = l_on.src;
		setLargeFont();
	}else{
		document.images["s_img"].src = s_on.src;
		document.images["m_img"].src = m_off.src;
		document.images["l_img"].src = l_off.src;
		setSmallFont();
	}
	
	setCookie("fontsize", f_type);	//save cookie
}


//Cookie control

function getCookie(key){
	var tmp = document.cookie + ";";
	var index1 = tmp.indexOf(key);
	var buf;
	if(index1 != -1){
		tmp = tmp.substring(index1, tmp.length);
		var index2 = tmp.indexOf("=", 0) + 1;
		var index3 = tmp.indexOf(";", index2);
		buf = unescape(tmp.substring(index2,index3));
	}
	return buf;
}

function setCookie(key, val){
	tmp = key + "=" + escape(val) + "; ";
	tmp += "expires=Tue, 31-Dec-2030 23:59:59; GMT; ";
	tmp += "path=/;";
	document.cookie = tmp;
}

function clearCookie(key){
	document.cookie = key + "=" + "xx; expires=Tue, 1-Jan-1980 00:00:00;";
}

window.onload = function(){

	setFont( getCookie("fontsize") );

	var img00 = new Image();
	var img01 = new Image();
	var img02 = new Image();
	var img03 = new Image();
	var img04 = new Image();
	var img05 = new Image();
	var img06 = new Image();
        var img07 = new Image();
        var img08 = new Image();
        var img09 = new Image();
        var img10 = new Image();
        var img11 = new Image();
        var img12 = new Image();
        var img13 = new Image();
        var img14 = new Image();
        var img15 = new Image();
        var img16 = new Image();
        var img17 = new Image();
        var img18 = new Image();
        var img19 = new Image();
        var img20 = new Image();
        var img21 = new Image();
        var img22 = new Image();
        var img23 = new Image();
        var img24 = new Image();
        var img25 = new Image();
	img00.src = "/images/main01_o.jpg";
	img01.src = "/images/main02_o.jpg";
	img02.src = "/images/main03_o.jpg";
	img03.src = "/images/main04_o.jpg";
	img04.src = "/images/main05_o.jpg";
	img05.src = "/images/main06_o.jpg";
	img06.src = "/images/main07_o.jpg";
	img07.src = "/images/bnr01_on.jpg";
	img08.src = "/images/bnr02_on.jpg";
	img09.src = "/images/bnr03_on.jpg";
	img10.src = "/images/bnr04_on.jpg";
	img11.src = "/images/bnr05_on.jpg";
	img12.src = "/images/bnr06_on.jpg";
	img13.src = "/images/bnr07_on.jpg";
	img14.src = "/images/more_btn_on.jpg";
	img15.src = "/common_img/member_img_on.jpg";
	img16.src = "/common_img/top_member_title_on.gif";
	img17.src = "/common_img/pagetop_on.gif";
	img18.src = "/common_img/footer_access_btn_on.gif";
	img19.src = "/common_img/bnr01_sub_on.jpg";
	img20.src = "/common_img/bnr02_sub_on.jpg";
	img21.src = "/common_img/bnr03_sub_on.jpg";
	img22.src = "/common_img/bnr04_sub_on.jpg";
	img23.src = "/common_img/bnr05_sub_on.jpg";
	img24.src = "/common_img/bnr06_sub_on.jpg";
	img25.src = "/common_img/bnr07_sub_on.jpg";

}