Queue Static

<html>
<head>
<title>program Queue</title>
<script language="javascript">

function DataQueue()
{
var queue = [];
queue.unshift(1);
queue.unshift(2);

var i = queue.pop();
document.write(i + "<br>");
queue.unshift(3);
queue.unshift(4);
var i = queue.pop();
document.write(i + "<br>");
}

</script>
</head>
<body>
<form name="FormStrukturData">
<input name="btnQueue" value="Queue" type="button"
onClick = "DataQueue();">

</form>
</body>
</html>