WI-FI SHIELD AND ARDUINO

I really need help . the thing is my project in which i am working on is to control home appliances using Web Through Wi-Fi . For example , there should be a button on the page to turn on LED , just by clicking it the LED should turn on . so , the question is how can we get that button on the web page (IP ADDRESS) .after clicking it how the data would be send from web to arduino board so that , i can do furthur controlling of home appliances . please help me . just give me an idea about the web page and how to send data from web to arduino .thank you in advance .

so , the question is how can we get that button on the web page (IP ADDRESS)

On what page? Is the Arduino a server or a client?

after clicking it how the data would be send from web to arduino board

As another GET request. You are printing the GET requests, aren't you?

the thing is my project in which i am working on is to control home appliances using Web Through Wi-Fi

Sounds like homework for someone who has never gotten two computers to talk to each other. This is NOT a beginner project.