in MotionMark/resources/extensions.js [524:533]
_childIndex: function(i)
{
var left = this._leftIndex(i);
var right = this._rightIndex(i);
if (left != -1 && right != -1)
return this._compare(this._values[left], this._values[right]) > 0 ? left : right;
return left != -1 ? left : right;
},