case.js

来自「这是《JavaScript学习源代码》一书的源代码」· JavaScript 代码 · 共 9 行

function check_input()
{
  // get user input from text field in form id of f
  var entry = document.forms[0].textfield.value;

  // compare input and display an appropriate message
  if(entry.toLowerCase() == "castle") alert("Accepted");
  else alert("Refused");
}