Handling different browsers

I have using a form to pass data to an action page, with method set to "post" . everything is working fine in IE8 and Firefox, however when I use safari I can see the data are passed in the URL and I am getting the error that name is not defined in form.

If I use a different code in the action page like

#URL.name# instead of #form.name#

then safari is working fine.... but I am getting the error from IE8 and Firefox that name is not defined iin URL.

I think I need a code to validate the browser and execute the right version of the code, any simple ready to "paste" code around here??

Thanks.