Hourglass without loop

hourglass.js

var temp = 0;
function draw(max) {
    if (temp >= max * 2) return;
    temp = temp + 2;
    if (temp <= max && temp != max*2) ast(max - temp, '', max);
    else if (temp >= max && temp != max*2) ast(temp - max, '', max);
}
function ast(col, string, max) {
    if (string.length > col) {
        console.log(Array((max - col)/2).join(' ') + string);
        return draw(max);
    } else ast(col, string += '*', max);
}
draw(26);