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<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script>
$(function () {
var f = $("#x");
f.on("submit", function () {
f.slideUp("slow", function () {
f.off("submit").submit()
});
return false
})
});
</script>
</head>
<body>
<form id="x" action="http://javascript.ru/forum/">
<input name="">
<input name="" type="submit" value="go">
</form>
</body>
</html>