tryjsref_form_elements 在线代码实例

 <form id="frm1" action="demo-form">
  First name: <input type="text" name="fname" value="Donald"><br>
  Last name: <input type="text" name="lname" value="Duck"><br>
  <input type="submit" value="Submit">
</form> 


<p>Return the value of each element in the form:</p>
<script>
var x=document.getElementById("frm1");
for (var i=0;i<x.length;i++)
  {
  document.write(x.elements[i].value);
  document.write("<br>");
  }
</script>