dom.js

这是《JavaScript学习源代码》一书的源代码

// a function to demonstrate three ways to address a form component
function modify()
{
  // address through element hierarchy
  window.document.forms[0].elements[0].options[1].selected = true;

  // address by id hierarchy
  window.document.forms.f.box.checked = true;

  // address directly by id
  window.document.getElementById("txt").value = "Modified";

}