Help! Broke my Zencart!

I was editing the category discription from within the control panel and when I clicked to save our zencart crashed! Help Please!

I did place some simple java code

onClick="MM_openBrWindow

within the discription that I have used before on the site to open up a size chart.

How do I get in to fix this? THe admin is crashed as well.

My server does back up but if I have them restore I may lose our orders for the day!

Well, I guess the error somehow prompted a restore on the server side to just before my change efforts and nothing was lost. Either that or it was some spooky zen magic....I was able to insert the code for my size chart after a few alterations to it. Sorry for the alarm.