MSIE의 insertAdjacentHTML 에뮬레이션

//------------------------ MSIE의 insertAdjacentHTML 에뮬레이션
if(typeof HTMLElement!="undefined" && !HTMLElement.prototype.insertAdjacentElement){
HTMLElement.prototype.insertAdjacentElement = function(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;
}
}

HTMLElement.prototype.insertAdjacentHTML = function(where,htmlStr)
{
var r = this.ownerDocument.createRange();
r.setStartBefore(this);
var parsedHTML = r.createContextualFragment(htmlStr);
this.insertAdjacentElement(where,parsedHTML)
}


HTMLElement.prototype.insertAdjacentText = function(where,txtStr)
{
var parsedText = document.createTextNode(txtStr)
this.insertAdjacentElement(where,parsedText)
}
}
//--------------- 에뮬레이션 끝