自己手动重写form的提交,写个button调用一个js方法,例子在下面
<script>
var id = '123';
function formsubmit(){
document.form.actoin = "xxx.action?id=" + a;
document.form.submit();
}
</script>
<form name="form">
<input type="button" class="btn" value="登录" onclick="formsubmit()" />
</form>