javascript利用正则快速找出两个字符串的不同字符

//by 夏天以南

<script language="JavaScript"> var str1 = "求一个比较字符串处理功能"; var str2 = "求两或三个比较字符串处理"; var re = new RegExp("(?=.*?)[^" + str1 +"](?=.*?)|(?=.*?)[^" + str2 + "](?=.*?)", "g"); var arr; while ((arr = re.exec(str1 + str2)) != null) { document.write(arr); } </script>