JS returns "Invalid regular expression: /(^|\.)ui-timepicker(\.|$)/: Stack overflow"

[ZHENG-JING-JZ]

Forgive me if this is a stupid question.
I tried using timpicker in rails. After I click on the timepicker element in the page, if I click other elements in the page, js will return the above message. Sometimes it also returns "Maximum call stack size exceeded".
Any ideas how to solve this problem?
Many thanks.