Help Wifi surfing issue

[saurabhrshah]

I had recently got the Samsung Galaxy S2. I had been using the Wifi connection when home. Since the past two days for some reason it connects the router but does not allow me to download or surf.
I checked the wifi router and I am able to surf on other devices. Can anybody tell me how to fix?

 

[james_uk]

I have had one or two times when i have turned my wifi on, it shows as connected but webpages just show them as loading but nothing happens, ive then turned my phone off the n back on, put internet on using wifi and then they have loaded fine, strange.