I've noticed navigating in websites like Dell or Google, that typing in their search text box with iPhone, in the keyboard appears a blue button 'Search' instead of the standard 'Go' button that appears on any normal form.
What should you do to display the search button?
You can influence this behaviour with:
<input type="search" />
Ignore the submit button's text being 'kettle,' I just wanted to be sure that it wasn't the submit button influencing the text of the iOS keyboard...
This is, of course, backwards compatible since a browser that doesn't understand type="search" will default to type="text", which is useful for creating forward-planning html5 forms.