Incorrect display of textboxes in alternative browsers

I have various ASPX input forms, using tables, with lots of 28px-wide textboxes arranged in columns.  They look perfect in IE7 and IE8 but in Firefox, Google Chrome and Opera the textboxes display approximately 5 times as wide, resulting in text wrapping and generally screwing up the nice appearance of the forms.  Very irritating after all the work I did to make them look professional in IE8!
Is there a way of coding the forms to stop this happening amd make them look more or less identical in all the major browsers?
RedcarJohn
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