In my HTML css:
.edit_field { height: 50px; width: 495px; line-height: 3.6; }
html:
e.which doesn't work in IE try e.keyCode, also you probably want to use keydown() instead of keypress() if you are targeting IE.
See http://unixpapa.com/js/key.html for more information.
jQuery keypress() event not firing?