Hi all I'm trying to change a mailto address depending on whether a checkbox is checked or not. The idea is that the normal address is: normal at foo.com and if the user checked "this is urgent" I can change it to urgent at foo.com. Not being great at JavaScript, I've got this far: function formcheck() if document.letter1.userurgent.checked; { document.letter1.action="mailto:urgent at foo.com"; } else { document.letter1.action="mailto:normal at foo.com"; } But not much further. Help! Cheers Francis