[help] Storing Multi-dimensional arrays in a variable

I'm not sure why my code is working. I think it maybe because of incorrect storage of multi arrays.

Can someone please take a look. Please provide advice on how to improve.

<script type="text/javascript">

var route ="Route A - Toronto to Barrie";
var jon, don;

var businfo=[
//[destination/route, pricing, number of available tickets]
["Route A - Toronto to Barrie", 10.10, 38],
["Route B - Toronto to Peterborough", 12.30, 38],
["Route C - Toronto to Montreal", 42.00, 38],
["Route D - Toronto to Thunder Bay", 114.30, 38]
];//end multi-array businfo


function determineRoute() {
for(i=0; i < 5; i++){
if (route === businfo[i][0]) {
jon = businfo[i];
break;
}
}
}

function setNumOfTick(ticketsordered) {
don = jon;
var tickettotal = don.splice(0,1);
tickettotal -= ticketsordered;
don.splice(0,1,tickettotal);
return(2);
}//end setPrice

alert(setNumOfTick(35));
</script>

determineRoute() is never called, so jon and don are both undefined when setNumTick is called (also, trying to splice an undefined variable throws an error);

determineRoute() is never called, so jon and don are both undefined when setNumTick is called (also, trying to splice an undefined variable throws an error);

lol thank you wow.. the was stupid of me... forgetting to call the determineRoute();.. thats what i get for making this program at 5am in the night.. thanks.

Also, your loop in derterminRoute() goes one element too many. So if the route is not found, you will get a JavaScript error.

A safer way to write that would be:

function determineRoute() {
for( i=0; i < businfo.length; i++) {
if (route === businfo[i][0]) {
jon = businfo[i];
break;
}
}
}