<script type="text/javascript">
        $(function() {
            $("#btn_1").click(function() {
            var $keyword = $("#Text1").val()
                setHeightKeyWord('bbb', $keyword, 'Red', true)
            });
        });

        function setHeightKeyWord(id, keyword, color, bold) {
            if (keyword == "")
                return;
            var tempHTML = $("#" + id).html();
            var htmlReg = new RegExp("\<.*?\>", "i");
            var arrA = new Array();
            for (var i = 0; true; i++) {
                var m = htmlReg.exec(tempHTML);
                if (m) {
                    arrA[i] = m;
                }
                else {
                    break;
                }
                tempHTML = tempHTML.replace(m, "[[[[" + i + "]]]]");
            }
            var replaceText
            if (bold)
                replaceText = "<b style='color:" + color + ";'>$1</b>";
            else
                replaceText = "<font style='color:" + color + ";'>$1</font>";
            var arrayWord = keyword.split(',');
            for (var w = 0; w < arrayWord.length; w++) {
                var r = new RegExp("(" + arrayWord[w].replace(/[(){}.+*?^$|\\\[\]]/g, "\\$&") + ")", "ig");
                tempHTML = tempHTML.replace(r, replaceText);
            }
            for (var i = 0; i < arrA.length; i++) {
                tempHTML = tempHTML.replace("[[[[" + i + "]]]]", arrA[i]);
            }
            $("#" + id).html(tempHTML);
        }
    </script>

效果图：