function render_html(name = '') {
    var num = 0;
    while(1) {
        num += 1
        if(document.getElementById(name + 'render_contect_' + String(num))) {
            data = document.getElementById(name + 'render_contect_' + String(num)).innerHTML;

            t_data = ['b', 'i', 's', 'del']
            for(var key in t_data) {
                var patt = new RegExp('<' + t_data[key] + '>((?:(?!<\/' + t_data[key] + '>).)*)<\/' + t_data[key] + '>', 'ig');
                data = data.replace(patt, '<' + t_data[key] + '>$1</' + t_data[key] + '>');
            }
            
            src_list = {
                'www.youtube.com' : '1'
            }
            data = data.replace(/&lt;iframe( (?:(?:(?!&gt;).)+))&gt;&lt;\/iframe&gt;/g, function(full, in_data) {
                src_data = data.match(/ src=['"]https:\/\/([^/'"]+)(?:[^'"]+)['"](?: |$)/);
                if(src_data) {
                    if(src_list[src_data[1]]) {
                        return '<iframe' + in_data + '></iframe>';
                    } else {
                        return full;
                    }
                }
            });
            
            document.getElementById(name + 'render_contect_' + String(num)).innerHTML = data;
        } else {
            break;
        }
    }
}