Mutliple Incudes of Jquery?
This can cause things to inexplicably fail – view page source and make sure you don’t have multiple …/jquery … .js files
To test if Jquery is present or not use something like this, and call it if not present
Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.