Is there a combobox implemented only using ext-core?

[jasonw]

I'm developing a web UI and want to use combobox in extjs, but my site is a public web site and the implementation in extjs is not good for that because the whole ext-all.js has to be downloaded by the browser.

actually I need a combobox like google suggestion, when a user is typing, it pops up a list by searching backend database in realtime.

Thank you in advance.

Jason

[jasonw]

Also, I need XTemplate when developing website because it has some useful features comparing with Template, but it is also in the extjs-all package.

Is there any other implementation so that I can use it directly by putting the .js file in my js/ folder other than import the ext-all.js.

I don't want to buy license for only those two widgets.

Jason