I'm creating a calendar script, and I've been fiddling with CSS all morning. The problem can be seen here. When you click one of the radio boxes next to the 'Recurrence' field at the bottom of the form, a div should be displayed containing further options, but the div's just obliterating the layout and expanding the page sideways. I want it to stay 405px wide like it's set to in the stylesheet, but expand down instead. Could anyone provide any tips as to how I'd achieve this?

Seems okay from here. The div expands out and downward.

Maybe you had an item that was wider than 405 pixels in the div?