Headlights turn off, when I turn them on etc.
 

HELP!!! Weird car problem: I have a Mazda 3. This morning my car was dead so I jumped it. Here's the weird part my headlights went crazy...when I turn them *off* they turn *on* etc. I went to AutoZone and they said the battery was fine but they had never seen this problem with the electrical/headlights. Any thoughts?? Is there a DIY way I can fix this?