I am trying to assign a value to a java variable inside the script that I am calling via ajax but once the call is over it shows variable as undefined:

$.ajax({
type: "GET",
url: "getdata.js",
dataType: "script",
success: function(){ alert( typeof data_array ); },
error:function(){ alert("WTH"); }
});


getdata.js:

<script type="text/javascript">
data_array=[1,2,3]
</script>