Bootstrap Datetimepicker 兼容IE8

bootstrap datetimepicker插件在IE8下显示无效，报错提示bootstrap-datetimepicker.js脚本不支持indexOf()方法

解决方案：在bootstrap-datetimepicker.js/bootstrap-datetimepicker.min.js最前面添加以下代码：

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;
  };
}