代码：

<script>
$(function() {$('#submit').click(function() {var data = {};var form = $('form').serializeArray();$.each(form, function() {data[this.name] = this.value;});alert(JSON.stringify(d));});
});
</script>
<form>
<input id="a1" type="input" value="" name="a1"><br>
<input id="a2" type="input" value="" name="a2"><br>
<input id="a3" type="input" value="" name="a3"><br>
<input id="a4" type="input" value="" name="a4"><br>
<select id="ax" name="ax">
<option value="0">选项1</option>
<option value="1">选项2</option>
</select><br>
<input id="submit" type="button" value="提交" name="submit">
</form>