Array Splice issue

1

Hi i am loading in and xml file based on the structure below…
<qID=“3.1a” level=“3” />
<qID=“3.1b” level=“3” />
<qID=“3.2a” level=“3” />
<qID=“3.2b” level=“3” /> … etc all the way to 3.12b

So what i am trying to do is to Splice the array into 2 parts, all the question ID’s that are A and all that are B for for example are placed into 2 new array’s like so:
level3a_Array = [3.1a, 3.2a, 3.3a, 3.4a]
level3b_Array = [3.1b, 3.2b, 3.3b, 3.4b]

but i am having problems with the code below trying to splice them and seperate them, so any help would be great!!!

var diagnosticXml:XML = new XML();
diagnosticXml.ignoreWhite = true;
diagnosticXml.load(“databank/databank.xml”);
diagnosticXml.onLoad = function(success:Boolean){
if(success){
aLevel = diagnosticXml.firstChild.childNodes;
lev3Array = aLevel[0].childNodes;

	for(var a=12; a&gt;0; a--){
      var level_3:Number = _root.aLevel[0].childNodes.length;
      _root.aLevel[0].childNodes.splice(0, 1);
       lev3B_Array = _root.aLevel[0].childNodes.splice(0, 1);
	}
	trace("lev3Array: "+ lev3Array);
}

}