iPad Safari - Make keyboard disappear

In iPad Safari browser, when I change focus from a textbox to a dropdown, the keyboard still remains... Is there some way (maybe with Javascript) I can hide the keyboard when user blurs from the textbox? Indirectly speaking, I am looking for a equivalent of (but in Mobile Safari) [tempTextField resignFirstResponder];

[kkeisuke]

readonly 読み取り専用にすると、ソフトウェアキーボードが表示されない。