<script>

function displayResult(){

    var x=document.getElementById("reset1").form.id;

    alert(x);

}

</script>

<form id="form1">

Email: <input type="text" id="email">

<input type="reset" id="reset1">

</form>

<button type="button" onclick="displayResult()">显示所属的表单ID</button>

​