解决Ext在ie9报错：不支持extjs对象的“createContextualFragment属性或方法

把下面的代码放入js文件的头部

<script type="text/javascript" language="javascript">
        if ((typeof Range !== "undefined") && !Range.prototype.createContextualFragment) {
            Range.prototype.createContextualFragment = function(html) {
                var frag = document.createDocumentFragment(),div = document.createElement("div");
                frag.appendChild(div);
                div.outerHTML = html;
                return frag;
            };
        }
</script>