JS正则表达式 替换括号,尖括号等

/*正则表达式 替换括号,尖括号等*/function toTxt(str) {var RexStr = /\<|\>|\"|\'|\&/gstr = str.replace(RexStr, function(MatchStr) {switch (MatchStr) {case "<":return "<";break;case ">":return ">";break;case "\"":return """;break;case "'":return "'";break;case "&":return "&";break;default:break;}})return str;}

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例：

???? 替换前：<script>alert('test---test');</script>

???? 替换后：<script>alert('test---test');</script>