正则表达式把Paul换成Ringo

正则表达式把Paul换成Ringo

<script>
var str='Paul,Paula,paul,Ppaul,Paul';//字符串
var result=str.replace(/\bPaul\b/g,"ringo");//将字符串中的Paul单词替换成ringo
document.write(result);
</script>

运行结果为：ringo,Paula,paul,Ppaul,ringo