jquery.bgiframe.js在IE9下提示INVALID_CHARACTER_ERR错误

SCRIPT5022: DOM Exception: INVALID_CHARACTER_ERR (5)
jquery.bgiframe.js, 行8 字符976

1 {if(!$('iframe.bgiframe',this)[0])this.insertBefore(document.createElement(html),this.firstChild);});};})(jQuery);

this.insertBefore(document.createElement('html'),this.firstChild);