Hola afiller.
Prueba esto:
Código PHP:
<html>
<head>
<script language="JavaScript">
var aItems = new Array(12, 8, 5, 10, 14, 8, 22, 4, 5, 6, 8);
function mostrarArreglo(){
var s;
s = "";
for (var i = 0; i < aItems.length; i++)
s += "," + String(aItems[i]);
alert(s.substr(1, s.length - 1));
}
function mostrarRepetidos(){
var s;
s = "";
aItems.sort();
for (var i = 1; i < aItems.length; i++)
if (aItems[i] == aItems[i - 1])
if (s.indexOf(String(aItems[i])) == -1)
s += "," + String(aItems[i]);
alert(s.substr(1, s.length - 1));
}
</script>
</head>
<body>
<form name="frm">
<input type="button" value="Mostrar valores" onclick="mostrarArreglo()">
<input type="button" value="Mostrar repetidos" onclick="mostrarRepetidos()">
</form>
</body>
</html>
Saludos.