οnchange="change(this.options[this.options.selectedIndex].value)"
使用:
<select name="action" οnchange="change(this.options[this.options.selectedIndex].value)"> <option value="a">a</option> <option value="b">b</option> <option value="c">c</option> </select><script> function change(item){ console.log(item); } </script>