​x
 
<!DOCTYPE html>
<html>
<body>
​
<form id="frm1" action="/demo/demo_form.asp" target="_self">
  名：<input type="text" name="fname" value="Bill"><br>
  姓：<input type="text" name="lname" value="Gates"><br><br>
  <input type="submit" value="提交">
</form>
​
<p>点击“试一试”以显示表单的目标：</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementById("frm1").target;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​