insertAdjacentElement 在FF中有没有好一点的解决办法(简洁一点的)

Question

//solved firefox couldn't support insertAdjacentElement
function insertAdjacentElement(where,parsedNode){
    switch(where){
        case   "beforeBegin":
            this.parentNode.insertBefore(parsedNode,this);
            break;
        case   "afterBegin":
            this.insertBefore(parsedNode,this.firstChild);
            break;
        case   "beforeEnd":
            this.appendChild(parsedNode);
            break;
        case   "afterEnd":
            if(this.nextSibling)
                this.parentNode.insertBefore(parsedNode,this.nextSibling);
            else
                this.parentNode.appendChild(parsedNode);
            break;
    }
}
//obj.insertAdjacentElement(where,parsedNode);

Answer 1

<script type="text/javascript">
HTMLElement.prototype.insertAdjacentHTML = function (sWhere, sHTML) {
//BlueDestiny
    var df; var r = this.ownerDocument.createRange();
    switch (String(sWhere).toLowerCase()) {
        case "beforebegin":
            r.setStartBefore(this);
            df = r.createContextualFragment(sHTML);
            this.parentNode.insertBefore(df, this);
            break;
        case "afterbegin":
            r.selectNodeContents(this);
            r.collapse(true);
            df = r.createContextualFragment(sHTML);
            this.insertBefore(df, this.firstChild);
            break;
        case "beforeend":
            r.selectNodeContents(this);
            r.collapse(false);
            df = r.createContextualFragment(sHTML);
            this.appendChild(df);
            break;
        case "afterend":
            r.setStartAfter(this);
            df = r.createContextualFragment(sHTML);
            this.parentNode.insertBefore(df, this.nextSibling);
            break;
    }
};
</script>