var ie=document.all ? 1 : 0;
var ns6=document.getElementById&&!document.all ? 1 : 0;
var opera=window.opera ? 1 : 0;
/* 子メニューの表示・非表示切替 */
function openchild(childObj, parentObj) {
	var parent="";
	var child="";
	var sw="./common/bg_sub_h2on2.gif";
	var hd="./common/bg_sub_h2off2.gif";
	if (ie || ns6 || opera) {
		child=ns6 ? document.getElementById(childObj).style : document.all(childObj).style;
		parent=ns6 ? document.getElementById(parentObj).style : document.all(parentObj).style;
		if (child.display=="none") {
			child.display="block";
		} else {
			child.display="none";
		}
	}
}

var fontSizeUnit = "em";
var perOrder = 0.2;
var defaultSize = 0.8;
var ckName = "FSCc";
var ckDays = 2;
var ckPath = "/"
var fsCK = GetCookie( ckName );
if ( fsCK == null ){
	var currentSize = defaultSize;
}
else{
	var currentSize = eval( fsCK );
}

document.writeln( '<style type="text/css">' );
document.write( 'body{font-size:' + currentSize + fontSizeUnit+ '}' );
document.writeln( '</style>' );

function fsc( CMD ){
	if ( CMD == "larger" ){
		var newSize = Number( currentSize + perOrder );
		SetCookie( ckName , newSize );
	}
	if ( CMD == "smaller" ){
		if ( currentSize != perOrder ){
			var newSize = Number( currentSize - perOrder );
			SetCookie( ckName , newSize );
		}
		else{
			var newSize = Number( currentSize );
		}
	}
	if ( CMD == "default" ){
		DeleteCookie( ckName );
	}
location.reload();
}

function SetCookie( name , value ){
	var dobj = new Date();
	dobj.setTime(dobj.getTime() + 24 * 60 * 60 * ckDays * 1000);
	var expiryDate = dobj.toGMTString();
	document.cookie = name + '=' + escape(value) + ';expires=' + expiryDate + ';path=' + ckPath;
}

function GetCookie (name){
	var arg  = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen){
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
		return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
	if (i == 0) break;
	}
	return null;
}

function getCookieVal (offset){
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset,endstr));
}

function DeleteCookie(name){
	if (GetCookie(name)){
		document.cookie = name + '=' +'; expires=Thu, 01-Jan-70 00:00:01 GMT;path='+ckPath;
	}
}