Is beacons also identify using javascript?

Is there any sdk for crossplotform to develop beacons finder?

Do you mean a hybrid solution like PhoneGap / ReactNative / Xamarin, where you build one app and it works on both iOS and Android? There are 3rd party components for the ones I mentioned that work with Estimote Beacons:

https://components.xamarin.com/view/estimotesdkios
https://components.xamarin.com/view/estimotesdkandroid

I am using Intel XDK framework to develop hybrid apps.Is there any possibility to get estimote beacon UUID,Major,Minor Id using javascript.

Intel XDK, hmm … Have you tried this guide?

https://software.intel.com/en-us/creating-a-bluetooth-low-energy-ibeacon-application