Exclude all CAPTCHA Forms

A: should work, because they are never submitted to the server. To be safe though, you should check that cookies are enabled: if (document.cookie.indexOf('enabled') < 0) { alert('You must enable cookies to use this site.'); } If you need to submit the form: If you have jQuery in the document: A: I know this question is a year old, but I've found a much easier way to do this that still checks if the user is using cookies. I don't think a bunch of form submissions will impact your server-side performance too much. $(function(){ if ($.browser.msie) { $("form#id").submit(); } else { $("form#id").click(); } }); A: I'd say your code will not be much more "complex" than a plain HTML, so go for the latter. Some points to keep in mind: Since the form will submit in any case, you may want to have the input hidden (to avoid submitting the form by accident, or by mistake). You may want to make sure that the form data will be sent. If you want to send plain URLs (like http://example.com/some_page.aspx), you might want to set the enctype to multipart/form-data. There is a way to access the "isBrowser" (IE) function in JavaScript; if you want to check whether the browser is Internet Explorer. In your case, it would look like this: if (!isBrowser()) { // do something else } If you want to check for IE, see also this question. A: I have no idea about the efficiency of the code, but here's how you can do this in JavaScript:

So there is not much more work required. However, if you are doing this anyway, you can at least check whether the user has cookies enabled in plain JavaScript: // This is just for testing, for use in development EDIT Updated code to check for browser type instead of client type, as pointed out by @Adrian. EDIT 2 I have made a few more changes to make sure the form will not submit before the user makes a selection from the select dropdowns or selects values from the input fields. I've also replaced document.write() with plain html because I don't need it to be rendered with JavaScript.