js Html结构转字符串形式显示

    //Html结构转字符串形式显示 支持<br>换行
    function ToHtmlString(htmlStr) {
        return toTXT(htmlStr).replace(/\&lt\;br[\&ensp\;|\&emsp\;]*[\/]?\&gt\;|\r\n|\n/g, "<br/>");
    }
    //Html结构转字符串形式显示
    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;
    }