Verified answer

Yes, there is.

Try LogMeIn, free from:

It lets you access your PC, using only a web browser, from anywhere in the world.

if its a usb webcam then pretty much the only way is to leave your pc turned on and use some remote viewing software e.g. Logmein, VNC or teamviewer.

you should have bought an IP camera if surveillance is what you are looking for, they can be accessed remotely from anywhere in the world simply by using a browser (IE, Firefox, Chrome).

good luck!