Hello Sir,
Hope you are doing great! and thanks for providing me the opportunity to bid on this job. As a professional website developer, I have been working for the last 5 years. I have enriched set of skills including JavaScript.
I have read your requirements and I am ready to help you out in this problem. As I have similar working experience, I can provide you the best solution of your problem domain.
Would you have some time to start a short chat over here to discuss a little more and make the deal?
Kind Regards,