Método para Gerar Índice para HTML com JS

var htmlMenu = {
    generate : function htmlMenu(id) {
        var headers = {};
        var stack = [];
        var lastLevel = 0;
        var text,level;
        var levels = {'H1':0,'H2':1,'H3':2,'H4':3,'H5':4}
        var menu = '';
        $('#' + id + ' :header').each(function(a){
            actualLevel = levels[this.nodeName];
            if(actualLevel < lastLevel) {
              for(var r = actualLevel+1; r <= lastLevel; r++) {
                  delete stack[r];
              }
            }
            text = $(this).html();
            if(stack[actualLevel] == undefined) {
                stack[actualLevel] = 1;
            }
            else {
                stack[actualLevel]++;
            }
            var index = '';
            var first = true;
            for(i in stack) {
                index += (first ? '' : '.') + stack[i];
                first = false;
            }
            headers[index] = text;
            $(this).append('<a name =" '">');
            menu += "<a href="'#">" + index + " - " + text + "</a><br/>";
            lastLevel = actualLevel;
        })
        return menu;
    }
};