判断IE版本过低的JS插件

判断IE版本过低的JS插件。

将<!–[if lt IE 8]>中的数字8改成你要求IE浏览器的版本。JS中lowestSupportedIEVersion参数改成你要求的IE版本

<!--[if lt IE 8]>
<script>
    window._browserIsNotSupported = true;
    if (window.attachEvent) {
        window.attachEvent('onload', function () {
            var lowestSupportedIEVersion = 8;
            if (window.LOWEST_IE_VERSION != undefined) {
                lowestSupportedIEVersion = window.LOWEST_IE_VERSION;
            }
            var el = document.createElement('div'),
                    elStyle = el.style,
                    docBody = document.getElementsByTagName('body')[0],
                    linkStyle = 'color:#06F;text-decoration: underline;';
            el.innerHTML = '尊敬的用户：<br />' +
                    '本网站需要安装Internet Explorer更新版本的浏览器，' +
                    '请<a href="http://windows.microsoft.com/zh-cn/internet-explorer/download-ie" style="' + linkStyle + '" target="_blank">下载安装IE' + lowestSupportedIEVersion + '</a>（或更新）。' +
                    '也可以在其他浏览器，' +
                    '如<a href="http://www.google.com/intl/zh-CN/chrome/" style="' + linkStyle + '" target="_blank">Chrome</a>' +
                    '或<a href="http://www.firefox.com.cn/download/" style="' + linkStyle + '" target="_blank">Firefox</a>火狐中打开本网站';
            // elStyle.width = '100%';
            elStyle.width = '50%';
            elStyle.minWidth = '500px';
            elStyle.color = '#000';
            elStyle.fontSize = '14px';
            elStyle.lineHeight = '180%';
            elStyle.margin = '60px auto';
            elStyle.backgroundColor = '#fffbda';
            elStyle.border = '1px solid #CCC';
            elStyle.padding = '24px 48px';
            // elStyle.background = '#F00 url(styles/images/not-support-ie67.png) 48px 48px no-repeat';
            // elStyle.padding = '40px 40px 48px 160px';
            docBody.innerHTML = '';
            docBody.appendChild(el);
            // docBody.insertBefore(el,docBody.firstChild);
        });
    }
</script>
<![endif]-->