Hi,

I am really sorry to bother you folks with such basics but I am pulling my hair out over using an if statement with this function below. I have next to 0 java experience and have spend all day trying to get this working.

I am trying to make a slider/calculator to allow someone to work out total cost/discount

Inputs: 

      Course Type Wanted (Drop down but would like an option list if I can figure it out)

      No of Weeks

Outputs

PricePerWeek (Works OK)

TotalToPay (Works OK for now but will need to deduct the discount)

Discount (Needs IF No of Weeks >= 3 THEN give a 10% discount)

At the moment its hardcoded to  discount = 765 and when I try something like  

if  (noofweeks >= 3 ) { noofweeks * priceperweek * 0.1  ; }

it just results in the slider not appearing. 

2. jQuery(function() {
3.   var tarif = 600000,
4.   //  result_outptut = jQuery("#revenue span"),
5.    // discount_outptut = jQuery("#discount span"),
6.     client = 0,
7.     revenue = 0,
8.     check = 0,
9.     bob = 66,
10.     time = 0;
11.     
12. 
    
13.   function recount() {
14.     revenue = (client + check + time) * tarif;
15.     discount = 765
16. //if($a > $b) { echo "<p>A is larger than B</p>";}
17.  //   result_outptut.html(revenue + ' COP');
18.     jQuery("#revenue span").html(revenue + ' COP');
19.     jQuery("#discount span").html(discount + ' COP');
20.     jQuery("#priceperweek span").html(tarif + ' COP');

Any ideas?

http://jsfiddle.net/madsween/22u4orc0/144/