<html><body><h3>如何访问隐藏输入字段的演示</h3><input type="hidden" id="myInput" value="BEGTUT"><p>单击按钮以获取隐藏输入字段的值。</p><button onclick="myFunction()">试一试</button><p id="demo"></p><script>function myFunction() { var x = document.getElementById("myInput").value; document.getElementById("demo").innerHTML = x;}</script></body></html>