function GetCookieVal(offset)
//获得Cookie解码后的值
{
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}
function SetCookie(name, value)
//设定Cookie值
{
	var expdate = new Date();
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = (argc > 2) ? argv[2] : null;
	var path = (argc > 3) ? argv[3] : null;
	var domain = (argc > 4) ? argv[4] : null;
	var secure = (argc > 5) ? argv[5] : false;
	if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * 1000 ));
	document.cookie = name + "=" + escape (value) +((expires == null) ? "" : ("; expires="+ expdate.toGMTString()))
	+((path == null) ? "" : ("; path=" + path)) +((domain == null) ? "" : ("; domain=" + domain))
	+((secure == true) ? "; secure" : "");
}
function DelCookie(name)
//删除Cookie
{
	var exp = new Date();
	exp.setTime (exp.getTime() - 1);
	var cval = GetCookie (name);
	document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString();
}
function GetCookie(name)
//获得Cookie的原始值
{
	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 ShowNav(num){
	$("ul[id='menu']").each(function(i){
		if(num-i==1){
			$(this).fadeIn();
			$("#nav li:eq("+i+")").css("background-image","url(../images/bg_current.gif)");
		}else{
			$(this).hide();
		}
	});
}

$(document).ready(function(){
	var navPage=GetCookie("navPage");
	if(navPage!=null){
		$("ul[id='menu'] li .current").removeClass();
		$("ul[id='menu']").hide();
		$("ul[id='menu'] li").each(function(i){
			if(i==navPage){
				$(this).parent().show();
				$(this).children().addClass("current");
				$(this).children().html("<span>"+$(this).children().html()+"</span>");
			}
		});
	}else{
		$("ul[id='menu']").hide();
		$("ul[id='menu']:eq(0)").show();
		$("ul[id='menu'] li:eq(0) a").attr("class","current");
		$("ul[id='menu'] li:eq(0) a").html("<span>"+$("ul[id='menu'] li:eq(0) a").html()+"</span>");
	}
	$("ul[id='menu'] li").click(function(){
		$("ul[id='menu'] li .current").removeClass();
		$(this).children().addClass("current");
		$(this).children().html("<span>"+$(this).children().html()+"</span>");
		$("ul[id='menu'] li").each(function(i){
			if($(this).children().attr("class")=="current"){
				SetCookie('navPage', i)
			}
		});
	});

	$('#news').innerfade({
		animationtype: 'slide',
		speed: 750,
		timeout: 2000,
		type: 'random',
		containerheight: '1em'
	});
	$('#portfolio').innerfade({
		speed: 'slow',
		timeout: 4000,
		type: 'sequence',
		containerheight: '170px'
	});
	$('.fade').innerfade({
		speed: 'slow',
		timeout: 1000,
		type: 'sequence',
		containerheight: '1.5em'
	});
});