iFrame is not working in Chrome

I'm trying to get an iFrame to work in Chrome. I Submit the开发者_JAVA技巧 src url via a form.

Instead of the requested website however I just receive an error message from chrome:

This web page is not available. The webpage at http://www.google.com%22/ might be temporarily down or it might have moved permanently to a new web address.

I haven't actually added the %22/ to the address it adds that to the end of everything I submit with the form.

Any ideas?

The %22 is a double quote (") ... is it possible you've left one in code/javascript somewhere where it is not needed.