js Html構造を文字列に変換して表示します.

    //Html             <br>  

    function ToHtmlString(htmlStr) {

        return toTXT(htmlStr).replace(/\&lt\;br[\&ensp\;|\&emsp\;]*[\/]?\&gt\;|\r
|
/g, "<br/>");

    }

    //Html          

    function toTXT(str) {

        var RexStr = /\<|\>|\"|\'|\&|　| /g

        str = str.replace(RexStr,

        function (MatchStr) {

            switch (MatchStr) {

                case "<":

                    return "&lt;";

                    break;

                case ">":

                    return "&gt;";

                    break;

                case "\"":

                    return "&quot;";

                    break;

                case "'":

                    return "&#39;";

                    break;

                case "&":

                    return "&amp;";

                    break;

                case " ":

                    return "&ensp;";

                    break;

                case "　":

                    return "&emsp;";

                    break;

                default:

                    break;

            }

        }

        )

        return str;

    }