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?
having type="search" is usually all you need to make software Search keyboard appear however in iOS8 it is mandatory to have a wrapping form with action attribute.
So the following code would have a software keyboard with “Return” button
<form>
<input type="search" />
</form>
But this code should have blue “Search” button instead
<form action=".">
<input type="search" />
</form>