Using Salesforce SOAP API in Ajax

Just a small post(its a very old functionality but I just posted it now) for how to create record using /soap/ajax/ in Salesforce. The code can be written in Visualforce page as well as Custom button as javascript.

Reference: SOAP API

Usage:

1. Can be used to create record like logs or attachments from javascript hence reducing server processing time.
2. Can query record to check values in page layout buttons.