_createEl = function ( type, attr, cont, html )
{
	var ne = document.createElement( type );
	if (!ne)
		return false;
	
	if (attr != null)
		for (var a in attr)
			ne[a] = attr[a];
		
	if (typeof(cont) == "string" && !html)
		ne.appendChild( document.createTextNode(cont) );
	else if (typeof(cont) == "string" && html)
		ne.innerHTML = cont;
	else if (typeof(cont) == "object")
		ne.appendChild( cont );

	return ne;
}

_clearEl = function ( id )
{
	var ele = _getEl( id );
	
	if (!ele)
		return false;
	
	while (ele.childNodes.length)
		ele.removeChild( ele.childNodes[0] );
	
	return true;
}

_removeEl = function ( ele )
{
	var e = _getEl(ele);
	
	if (!e)
		return false;
	else if (e.parentNode.removeChild(e))
		return true;
	else
		return false;
}

_replaceContent = function ( id, cont, html )
{
	var ele = _getEl( id );
	
	if (!ele)
		return false;
	
	_clearEl( ele );
	
	if (typeof(cont) == "string" && !html)
		ele.appendChild( document.createTextNode(cont) );
	else if (typeof(cont) == "string" && html)
		ele.innerHTML = cont;
	else if (typeof(cont) == "object")
		ele.appendChild( cont );
}

_getEl = function ( ele )
{
	if (typeof(ele) == "undefined")
	{
		return false;
	}
	else if (typeof(ele) == "string")
	{
		var re = document.getElementById( ele );
		if (!re)
			return false;
		else if (typeof(re.appendChild) != "undefined" ) {
			return re;
		} else {
			return false;
		}
	}
	else if (ele != null && typeof(ele.appendChild) != "undefined")
		return ele;
	else
		return false;
}


_appendChildren = function ( id, arr )
{
	var ele = _getEl( id );
	
	if (!ele)
		return false;
	
	
	if (typeof(arr) != "object")
		return false;
		
	for (var i=0;i<arr.length;i++)
	{
		var cont = arr[i];
		if (typeof(cont) == "string")
			ele.appendChild( document.createTextNode(cont) );
		else if (typeof(cont) == "object")
			ele.appendChild( cont );
	}
}

_createSelect = function ( attr, opt, sel )
{
	var select = _createEl( 'select', attr );
	for (var a in opt)
	{
	
		var o = {id:a};
		if (a == sel)	o.selected = "selected";
		select.appendChild( _createEl( 'option', o, opt[a] ) );
		
	}
	
	return select;
}

_getPos = function ( ele )
{
	var ele = _getEl(ele);

	var obj = ele;

	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;


	var obj = ele;
	
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
		curtop += obj.y;

	return {x:curleft, y:curtop}
}