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var str = "한글 <!-- 주석 --> <script type="text/javascript">window.alert('hellow')<\/script>";
 str += "<style type='text/css> td {font-size:9pt;}<\/style>";
 str += "<br /> <h3>Hellow Blog</h3>";


//태그제거
var RegExpTag = "<[^<|>]*>";
str = str.replace(RegExpTag,"");
//result : 한글 window.a lert('hellow'); td {font-size:9pt;} Hellow Blog


//스크립트 제거
var RegExpJS = "<script[^>]*>(.*?)</script>";
str = str.replace(RegExpJS,"");
//result : 한글 <!-- 주석 -->  <br> <h3>Hellow Blog</h3>


//스타일 제거
var RegExpCSS = "<style[^>]*>(.*?)";
str = str.replace(RegExpCSS,"");
//result : 한글 <!-- 주석 --> <script type="text/javascript">window.a lert('hellow');</script><br></style[^><h3>Hellow Blog</h3>


//한글 제거
var RegExpHG = "[ㄱ-ㅎ가-힣]";
str = str.replace(RegExpHG,"");
//result : <!-- 주석 --> <script type="text/javascript">window.a lert('hellow');</script><br><h3>Hellow Blog</h3>


//주석 제거
var RegExpDS = /<!--[^>](.*?)-->/g;
str6 = str.replace(RegExpDS,"");
//result : 한글 <script type="text/javascript">window.a lert('hellow');</script><br><h3>Hellow Blog</h3>


출처 : http://blueb.net/blog/1174
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