IE8数组不支持indexOf方法

最近用户老说下载不了,搞了半天原来是IE8不支持数组的indexOf方法。万恶的IE啊。

解决办法:

if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function(elt /*, from*/) {
        var len = this.length >>> 0;
        var from = Number(arguments[1]) || 0;
        from = (from < 0) ? Math.ceil(from) : Math.floor(from);
        if (from < 0)
            from += len;
        for (; from < len; from++) {
            if (from in this && this[from] === elt)
                return from;
        }
        return -1;
    };
}

参考链接:http://www.jb51.net/article/35277.htm

诶,天天搞浏览器兼容画页面,弄的我都快成前端了。