JS使用cookie实现DIV提示框只显示一次的方法

这里运用JavaScript的cookie技术，控制网页上的提示DIV只显示一次，也就是当用户是第一次打开网页的时候才显示，第二次自动隐藏起来，很好的提升了用户体验，不会使用户烦感；利用Cookies，我们还可做超多的事情，慢慢体会吧。

运行效果截图如下：

在线演示地址如下：

http://demo.jb51.net/js/2015/js-cookie-div-dlg-show-once-codes/

具体代码如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>cookie，只显示一次的DIV提示框</title>
<style>
.note {
    height: 100px;
    width: 600px;
    background: url(images/tishi.jpg) #FEFFCF 40px 0px no-repeat;
    border: #EDCE7B 1px solid;
}

.guanbi {
    float: right;
    font-size: 12px;
    padding: 6px;
}
</style>
<script>
    function cookiesave(n, v, mins, dn, path) {
        if (n) {
            if (!mins)
                mins = 365 * 24 * 60;
            if (!path)
                path = "/";
            var date = new Date();
            date.setTime(date.getTime() + (mins * 60 * 1000));
            var expires = "; expires=" + date.toGMTString();
            if (dn)
                dn = "domain=" + dn + "; ";
            document.cookie = n + "=" + v + expires + "; " + dn + "path="
                    + path;
        }
    }
    function cookieget(n) {
        var name = n + "=";
        var ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ')
                c = c.substring(1, c.length);
            if (c.indexOf(name) == 0)
                return c.substring(name.length, c.length);
        }
        return "";
    }
    function closeclick() {
        document.getElementById('note').style.display = 'none';
        cookiesave('closeclick', 'closeclick', '', '', '');
    }
    function clickclose() {
        if (cookieget('closeclick') == 'closeclick') {
            document.getElementById('note').style.display = 'none';
        } else {
            document.getElementById('note').style.display = 'block';
        }
    }
    window.onload = clickclose;
</script>
</head>
<body>
    <div id="note" class="note" style="display: none;">
        <div>
            <a href="#" onclick="closeclick()" class="guanbi"><img
                src="images/close-note.gif" border="0" /></a>
        </div>
    </div>
</body>
</html>