(function($) {
	$.widget("ui.combobox", {
		_create: function() {
			var self = this;
			var select = this.element;
			select.hide();
			
			// process select options into an array
			var opts = new Array();
			$('option',select).each(function(index) {
				var opt = new Object();
				opt.value = $(this).val();
				opt.label = $(this).text();
				opts[opts.length] = opt;
			});
			
			// set up input text element
			var input = $("<input>");
			input.insertAfter(select);
			input.autocomplete({
					source: opts,
					delay: 0,
					change: function(event, ui) {
						if (!ui.item) {
							// user didn't select an option, but what they typed may still match
							var enteredString = $(this).val();
							var stringMatch = false;
							for (var i=0; i < opts.length; i++){
								if(opts[i].label.toLowerCase() == enteredString.toLowerCase()){
									select.val(opts[i].value);// update (hidden) select
									$(this).val(opts[i].label);// corrects any incorrect case
									stringMatch = true;
									break;
								}
							}
							if(!stringMatch){
								// remove invalid value, as it didn't match anything
								$(this).val($(':selected',select).text());
							}
							return false;
						}
					},
					select: function(event, ui) {
						select.val(ui.item.value);// update (hidden) select
						$(this).val(ui.item.label);
						return false;
					},
					focus: function(event, ui) {
						if (event.which === 38 || event.which === 40){
							$(this).val(ui.item.label);
							return false;
						}
					},
					// stop parent form from being while menu is open
					open: function(event, ui) {
						input.attr("menustatus","open");
					},
					close: function(event, ui) {
						input.attr("menustatus","closed");
					},
					minLength: 0
				});
			input.addClass("ui-widget ui-widget-content ui-corner-left");
			// initialise text with what's currently selected
			input.val($(':selected',select).text());
			//clear text when user clicks in text input
			input.click(function(){
				$(this).val("");
			});
			
			// over-ride form submit, so it cant submit if the menu is open
			input.attr("menustatus","closed");
			var form = $(input).parents('form:first');
			$(form).submit(function(e){
				return (input.attr('menustatus') == 'closed');
			});
				
			// set up button for fake 'select'
			var btn = $("<button>&nbsp;</button>");
			btn.attr("tabIndex", -1);
			btn.attr("title", "Show All Items");
			btn.insertAfter(input);
			btn.button({
				icons: {
					primary: "ui-icon-triangle-1-s"
				},
				text: false
			});
			btn.removeClass("ui-corner-all");
			btn.addClass("ui-corner-right ui-button-icon");
			btn.click(function() {
				//event.preventDefault();
				// close if already visible
				if (input.autocomplete("widget").is(":visible")) {
					input.autocomplete("close");
					return false; // return false, so form isn't automatically submitted
				}
				// pass empty string as value to search for, displaying all results
				input.autocomplete("search", "");
				input.focus();
				return false; // return false, so form isn't automatically submitted
			});
			
			// add some styles
			btn.css("margin-left","-1px");
			input.css("margin",0);
			btn.css("padding",0);
			input.css("padding","0 0.4em 0 0.4em");
			$('span.ui-button-text', btn).css("padding",0);
			input.css("width",select.outerWidth() - btn.outerWidth(true) - 10);// match the width
		}
	});

})(jQuery);
	
// new code
$(function() {
	$(".combobox").combobox();
});