Make JS code more robust for IE

In JavaScript some errors can happen because of referencing of undefined variables. This is for example the case when testing for existance:

if (console) ....
if (jsmath)

Both examples are illegal and will throw an exception on IE.

This issue is to check for such calls and fix them

See http://stackoverflow.com/questions/3326650/console-is-undefined-error-for-internet-explorer