<html><body><h1>JavaScript 字符串方法</h1><p>indexOf() 方法接受第二个参数作为搜索的起始位置：</p><p id="demo"></p><script>var str = "The full name of China is the People's Republic of China.";var pos = str.indexOf("China",18);document.getElementById("demo").innerHTML = pos;</script></body></html>