Uncaught TypeError: Cannot set property ‘touchstart’ of undefined for JQuery UI DatePicker

I kept getting this error when trying to integrate the JQuery UI DatePicker (http://jquerymobile.com/demos/1.0a4.1/experiments/ui-datepicker/) into one of my pages:

Uncaught TypeError: Cannot set property ‘touchstart’ of undefined

Finally realized that I was using a very old version of JQuery. Once I upgraded to the latest version it started working. Hope that helps you!