JavaScript: RegExp + replace

将Paul替换为ringo

<!DOCTYPE html>
<html>
<head lang="en">
   <meta charset="UTF-8">
    <title>RegExp</title>
</head>
<script>
     function strreplace(){
         var str=document.getElementById("str").value;
         var newstr=str.replace(/paul/g,"Ringo");
         document.getElementById("demo").innerHTML = newstr;
     }
</script> <body>
paul like Spaul Paul paul
    <br><br><br><input type="text" name="str" id="str">
    <input type="button" value="替换" onclick="strreplace()">
     <br><br>替换后：<p id="demo"></p>

</body>