javascript 关键字高亮显示实现代码

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>关键字高亮显示</title>
</head>
<body>
    <div class="result" id="result">
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    </div>
    <!--iframe id="iframe1" style="600px; height:500px;" src="about:blank"></!--iframe-->
    <script>
        function SearchHighlight(idVal, keyword) {
            var pucl = document.getElementById(idVal);
            if ("" == keyword) return;
            var temp = pucl.innerHTML;
            var htmlReg = new RegExp("<.*?>", "i");
            var arrA = new Array();
            //替换HTML标签
            for (var i = 0; true; i++) {
                var m = htmlReg.exec(temp);
                if (m) {
                    arrA[i] = m;
                }
                else {
                    break;
                }
                temp = temp.replace(m, "{[(" + i + ")]}");
            }
            words = unescape(keyword.replace(/+/g, ' ')).split(/s+/);
            //替换关键字
            for (w = 0; w < words.length; w++) {
                var r = new RegExp("(" + words[w].replace(/[(){}.+*?^$|\[]]/g, "\$&") + ")", "ig");
                temp = temp.replace(r, "<b style='color:Red;'>$1</b>");
            }
            //恢复HTML标签
            for (var i = 0; i < arrA.length; i++) {
                temp = temp.replace("{[(" + i + ")]}", arrA[i]);
            }
            pucl.innerHTML = temp;
            //写入iframe
            /*
            var iframe = document.getElementById('iframe1');
            iframe.contentDocument.body.innerHTML = temp;
            */
        }
        SearchHighlight("result", "脚本 学习 vbscript div");
    </script>
</body>
</html>
屏蔽HTML标签，支持多关键字（以空格间隔），关键字内可含有特殊字符
转自：http://www.jb51.net/article/24707.htm