<html><head>
<title>JavaScript Queue using unshift</title>
<script language="JavaScript">
function queueDemo() {
var queue = [];
queue.unshift(1);
queue.unshift(2);
var i = queue.shift();
document.write(i + "<br />");
queue.unshift(3);
queue.unshift(4);
var i = queue.shift();
document.write(i + "<br />");
}
</script></head><body>
<form name="frmTest">
<input name="btnQueue" value="Queue" type="button" onClick="queueDemo();" />
</form></body></html>
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