how to print embedded PDF file using javascript which works in all browsers

Hi ,
I have below code , which works fine in all IE browser only.
I want to print embedded PDF file in all browser using <embed> tag only. "Not iframe and object tag ,I have used these tag but they are not working on all browsers."

<html>
<head>
<script> function printDocument()
{
var x = document.getElementById("myDoc"); x.print();
}
</script>
</head>
<body>
<embed id="myDoc" src ="myDoc.pdf" width="550" height="550" name="blabla">
<button onclick="printDocument()">Stampa</button>
</body>
</html>
...