jQuery UI ComboBox

by Amit Vishwakarma

HTML

<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.17/themes/smoothness/jquery-ui.css">
  <select id="combobox" name="scheme_name" style="width:300px" class="forminput">
						
	
     <option value="Select" >amit</option>
     <option >vishwakarma</option>
     <option >mohsin</option>
     <option >khan</option>
                         </select>

CSS

body {font-size:10px;}
.ui-combobox {
    position: relative;
    display: inline-block;
}
.ui-combobox-button {
    position: absolute;
    top: 0;
    bottom: 0;
    margin-left: -1px;
    padding: 0;
    /* adjust styles for IE 6/7 */
    *height: 1.7em;
    *top: 0.1em;
}

.ui-autocomplete-input {
    margin: 0;
    padding: 0.3em;
}

JavaScript

(function($) {
    $.widget("ui.combobox", {
        _create: function() {
            var input, self = this,
                select = this.element.hide(),
                selected = select.children(":selected"),
                value = selected.val() ? selected.text() : "",
                wrapper = $("<span>").addClass("ui-combobox").insertAfter(select);

            input = $("<input>").appendTo(wrapper).val(value).addClass("ui-state-default").autocomplete({
                delay: 0,
                minLength: 0,
                source: function(request, response) {
                    var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
                    response(select.children("option").map(function() {
                        var text = $(this).text();
                        if (this.value && (!request.term || matcher.test(text))) return {
                            label: text.replace(
                            new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + $.ui.autocomplete.escapeRegex(request.term) + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<strong>$1</strong>"),
                            value: text,
                            option: this
                        };
                    }));
                },
                select: function(event, ui) {
                    ui.item.option.selected = true;
                    self._trigger("selected", event, {
                        item: ui.item.option
                    });
                    
                },
                change: function(event, ui) {
                    if (!ui.item) {
                        var matcher = new RegExp("^" + $.ui.autocomplete.escapeRegex($(this).val()) + "$", "i"),
                            valid = false;
                        select.children("option").each(function() {
                            if ($(this).text().match(matcher)) {
                                this.selected = valid = true;
                                return...