Problem solved when I wrote the piece of code below where empIdTT is a hidden field

	$("#country").result(function(event, data, formatted) {
		if (data)
		$("#empIdTT").val(data[1]);
	});

To do this consider following code snippet:

var data = [ {emp_name:'Employee A', emp_id:'121'}, {emp_name:'Employee B', emp_id: '345'} ];
$("...").autocomplete(data, {
  formatItem: function(item) {
    return item.emp_name;
  }
}).result(function(event, item) {
    $('#hidden_field').val(item.emp_id);
});

Here in above code, your jsp generates output in JSon format [ {emp_name:'Employee A', emp_id:'121'}, {emp_name:'Employee B', emp_id: '345'} ]. Both emp_name and emp_id are present in the json output.

Also the hidden field id is “hidden_field” whose value we set in result() method.

Hope this helps you have solves your problem.

$('#country').autocomplete("getdata.jsp", {extraParams: {bar: 4 }} );
// This will generate url like:
// getdata.jsp?q=some&bar=4

Hope that helps.

empV=empItt.empAutoComplete();
Iterator it=empV.iterator();
while (it.hasNext()){
	String myId=(String)it.next();
	String myName=(String)it.next();
       out.write(myName+"\n");
}

/* main page */

jQuery(function(){
	$("#country").autocomplete("employeeData.jsp");

});

But I failed to get the employee id in hidden field, Please what the method I should use
to get the id in hidden field
Thanks in advance