Please find the attached demo... In this demo there is a Dropdownlist which is working just like Textbox autocomplete.
In above demo there is only 3 jquery library.
If you getting any problem in Internet explorer. Just goto the "chosen.proto.js" file and replace the below code.
if (Prototype.Browser.IE9) {
if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) {
Prototype.BrowserFeatures['Version'] = new Number(RegExp.$1);
}
}
WITH
if ($.browser.msie) {
if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) {
$.browser.version = new Number(RegExp.$1);
}
}