Arrays/Functions

AC208

OK ive been trying this all day and cant get it right can anybody help?
I have a button. When this button is pressed two functions are called. The first works fine but for the second to work i need to access a value in an array and use the answer from the first function to do some calculations.

Ill explain what im doing to make it a little easier to understand

The first function calculates speed per metre. I want the second function to use the athletes speed per metre to calculate their % of the world record for that particular distance. The world records for each distance are held in an array.

I have tried all day to do this myself but i cant get my head around it. Here is some of my code if it will help:

<!--function to calculate speed per metre-->
<script>
function doit()
{
var res=document.rpc
var speed=res.speed.value
res.speed.value=(res.distance.value/((res.hours.value*3600)+(res.minutes.value*60)+(res.seconds.value*1)));
return speed;
}
</script>

<!--function to calculate the distance-->
<script>
function distance()
{
var distance=document.rpc.distance.value
if(document.rpc.distance.value="100")
{
document.rpc.wrspeed.value=(recordm[0]/document.rpc.speed.value);
}
}
</script>

<!--array-->

<script type = "text/javascript">
var recordm = new Array(10)
recordm[0] =("9.79");
.......

Am i right in using an if satement?
If anybody can give me feedback it would really help me thanks.