Thank you, you are right I did want to learn i want to create it to loop but when i do it it gets stock. this is what i have writen so far.
<script>
var player_one;
var player_two;
var start;
var dexterity=0;
var level=2;
var n_attacks;
var hit_roll;
var random;
var difficulty;
var dodge=2;
var critical;
var damage;
var strength=2;
var random_two;
var random_one;
var success;
function focusout()
{
if (!start)
{
n_attacks=Math.round(level/3);
random=Math.random()*100;
document.write(Math.round(random_one=random));
hit_roll=Math.round(dexterity*20+random_one);
difficulty=Math.round(dodge*20);
r=Math.random()*5;
random_two=Math.round(r);
document.write("