用正则表达式除字符串中所有标点符号
<script language="javascript">
var str="jfkldsjalk,.23@#!$$k~! @#$%^&*()(_+-=|\{}[]';:,./<>??gg g~```gf";
str=str.replace(/[\ |\~|\`|\!|\@|\#|\$|\%|\^|\&|\*|\(|\)|\-|\_|\+|\=|\||\\|\[|\]|\{|\}|\;|\:|\"|\'|\,|\<|\.|\>|\/|\?]/g,"");
alert(str);
</script>
用正则表达式提取html中文本
<script language="javascript"> str='<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title></head><br/ >'; str=str.replace(/<[^>]*>|/g,""); alert(str); </script>