Here is my code, the problem I have is the alert just isnt showing, however if the alert is put in the while loop it shows but outside the loop it doesn't could someone explain why?
<script>
function GetText() {
var name = document.getElementById("name").value;
var age = document.getElementById("age").value;
var house = document.getElementById("house").value;
var road = document.getElementById("road").value;
var city = document.getElementById("city").value;
var county = document.getElementById("county").value;
var country = document.getElementById("country").value;
var postCode = document.getElementById("postCode").value;
var activityNum = ["a1","a2","a3","a4","a5","a6","a7","a8","a9","a10","a11","a12","a13","a14","a15","a16","a17","a18","a19"];
var activityName = ["Rock climbing","Zipwire","Assault course","Orienteering","Raft Building","Team Challenges","Forest adventure walks","Tree climbing","High ropes zip wire","Night hill walks","Extreme rafting","High ropes","Tunnel mazes","Rock climbing on cliff","Cave exploring","Army assault course","Forest fitness test","All day mountain biking","Bungee jumping"];
var theirChoices = [];
var x = 0;
while (x < 20) {
choice = document.getElementById(activityNum[x]).checked;
if (choice == "1") {
var choice = activityName[x];
theirChoices.push(choice);
x++;
} else {
x++;
}
}
alert(theirChoices);
}
</script>
<input type="checkBox" id="a1" size="50" />Rock climbing<br>
<input type="checkBox" id="a2" size="50"/>Zipwire<br>
<input type="checkBox" id="a3" size="50"/>Assault course<br>
<input type="checkBox" id="a4" size="50"/>Orienteering<br>
<input type="checkBox" id="a5" size="50"/>Raft Building<br>
<input type="checkBox" id="a6" size="50"/>Team Challenges<br>
<input type="checkBox" id="a7" size="50"/>Forest adventure walks<br>
<input type="checkBox" id="a8" size="50"/>Tree climbing<br>
<input type="checkBox" id="a9" size="50"/>High ropes zip wire<br>
<input type="checkBox" id="a10" size="50"/>Night hill walks<br>
<input type="checkBox" id="a11" size="50"/>Extreme rafting<br>
<input type="checkBox" id="a12" size="50"/>High ropes<br>
<input type="checkBox" id="a13" size="50"/>Tunnel mazes<br>
<input type="checkBox" id="a14" size="50"/>Rock climbing on cliff<br>
<input type="checkBox" id="a15" size="50"/>Cave exploring<br>
<input type="checkBox" id="a16" size="50"/>Army assault course<br>
<input type="checkBox" id="a17" size="50"/>Forest fitness test<br>
<input type="checkBox" id="a18" size="50"/>All day mountain biking<br>
<input type="checkBox" id="a19" size="50"/>Bungee jumping<br>
<input type="button" value="Submit All" size="50" onClick="GetText()"/><br>