In this regard i want to know that can I make a complete HTML Web page through which i can control almost 15 appliances.
You can make a client side html with lots of js, css and images and call the web services server (arduino + ethernet) with JSONP. The server side code could be the same for 3 ot 15 devices since you can encode the the device no in the web service call. I did that and it works on most browsers and devices.Good luck
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