ICD10 Search with JQuery Autocomplete

*** searches the underlying nodes ***

HTML

<script src="http://d3js.org/d3.v2.js"></script>
<script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
<input id="tags" size="60">
<div id="mysvg"></div>

CSS

.ui-helper-hidden-accessible {
    color: firebrick;
    clear: both;
}
.ui-autocomplete-input {
    font-size: 12px;
}

.ui-corner-all {
    color: steelblue;
}

JavaScript

var w = 4000,
    h = 2000;
var nodes= {
    "name": "Chapter-5 Mental, Behavioral and Neurodevelopmental disorders",
    "firstnode": "true",
    "key": "Mental, Behavioral and Neurodevelopmental disorders",
    "group": 0,
    "children": [{
        "name": "F01-F09 Mental disorders due to known physiological conditions",
        "key": "Mental disorders due to known physiological conditions",
        "group": 1,
        "children": [{
            "name": "F01 Vascular dementia",
            "group": 1,
            "children": [{
                "name": "F01.5 Vascular dementia",
                "group": 1,
                "children": [{
                    "name": "F01.50 Vascular dementia without behavioral disturbance",
                    "group": 1
                }, {
                    "name": "F01.51 Vascular dementia with behavioral disturbance",
                    "group": 1
                }]
            }]
        }, {
            "name": "F02 Dementia in other diseases classified elsewhere",
            "group": 1,
            "children": [{
                "name": "F02.8 Dementia in other diseases classified elsewhere",
                "group": 1,
                "children": [{
                    "name": "F02.80 Dementia in other diseases classified elsewhere without behavioral disturbance",
                    "group": 1
                }, {
                    "name": "F02.81 Dementia in other diseases classified elsewhere with behavioral disturbance",
                    "group": 1
                }]
            }]
        }, {
            "name": "F03 Unspecified dementia",
            "group": 1,
            "children": [{
                "name": "F03.9 Unspecified dementia",
                "group": 1,
                "children": [{
                    "name": "F03.90 Unspecified dementia without behavioral disturbance",
                    "group": 1
                }, {
                    "name": "F03.91 Unspecified dementia with...