Phonegap simple javascript not running (onClick issue?) - Both Android and iOS - javascript

This seems to work fine when I test in firefox. As soon as I install it through phonegap, it doesn't. I have removed as much code as I can to make it as simple as I can.
Why when I press the button, does the alert('ok'); not happen on iOS or Android?
My code is below.
Thanks,
<!DOCTYPE html>
<html>
<head>
<title>XYZ</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http:code.jquery.com/mobile/1.1.0/jquery.mobile-1.1.0.min.css" />
<script src="http:code.jquery.com/jquery-1.7.1.min.js"></script>
<script src="http:code.jquery.com/mobile/1.1.0/jquery.mobile-1.1.0.min.js"></script>
<script>
function saveResponseToLocalStorage(){
alert('ok');
}
</script>
</head>
<body>
<div data-role="page">
<div data-role="header">
<h1>XYZ</h1>
</div><!-- /header -->
<div data-role="content">
<h2>Search By Postcode + Name</h2>
<form>
<label for="name">Name:</label>
<input type="text" name="text" id="text" value="">
<br/>
<label for="city">Post Code:</label>
<input type="text" name="postcode" id="postcode" value="">
<br/>
<button onclick="saveResponseToLocalStorage()">Search</button>
</form>
</div><!-- /content -->
</div><!-- /page -->
</body>
</html>

Try to put this before the alert
navigator.notification.alert("ok");

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var costPerBike = document.getElementById('txtcostPerBike').value;
var calculateTotalCost = (totalProduction)*(costPerBike);
document.getElementById('txtcalculateTotalCost').value= calculateTotalCost;
}
I created a Plunker that works just fine when I remove the ValidateMyForm call (since you didn't include it). I'd say your issue lies in:
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what you are doing is not specifing what to do on succes or error.
try the following
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...
success:function(data){
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}
});
});
I hope this helps.
Edit: I'm sorry i automaticly made it ajax.. for a non-ajax approach try the next:
$('#form').submit(function() {
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<!doctype html>
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<head>
<meta charset="utf8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
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Yes, Change the ID's and It will work for more than one.

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