HTML view input parameters

Hello,

I love Creator! I'm having a little bit of trouble with the input parameters on an HTML view. Specifically, I can't seem to find a reliable way to test for a null value.

If a parameter is not specified, it does not meet the (input.param == null) test, but it will throw errors when I try to do other checks such as input.param.length().

How can I avoid null parameter errors?

Thanks,

Jesse