replace() 方法将接收字符串作为参数 - 在线编辑器

          <p>替换 "Microsoft" 为 "Mifengjc" :</p>
<button onclick="myFunction()">点我</button>
<p id="demo">请访问 Microsoft!</p>
<script>
  function myFunction() {
    var str = document.getElementById("demo").innerHTML;
    var txt = str.replace("Microsoft", "Mifengjc");
    document.getElementById("demo").innerHTML = txt;
  }
</script>
        