[jQuery] Help with some jquery basics

Can someone help me to get opid to be populated. The selectors all
work correctly, and the code cycles the correct elements (tested this
with an alert). Problem is I need to get the values I cycle in the
each statement out and into the wrapping click function.

Anyhelp would be appreciated. At the moment I get an opid[i] undefined
error.... Thanks for any help you can offer

var opid = new Array();

$("a.btn.submit").click(function(){
// alert($(this).attr("id").substr(7));
var userid = $(this).attr("id").substr(4);

$("#"+userid+" input:disabled").each(function(i){
// var opid = new Array();
if($("#chk_"+$(this).attr("id").substr(9)).is(":checked"))
{

if ($("#pa_"+$(this).attr("id").substr(9)).val() == '')
{
//display error,
alert("If you have selected to submit a PO you must give it a
weighting");
var error = 1;
}
else
{
alert($(this).attr("id").substr(9)+" "+$(this).val()+" "+$("#pa_"+
$(this).attr("id").substr(9)).val())
opid[i]['opid'] = $(this).attr("id").substr(9);
alert(opid[i]['opid']);
}
}
else
{
// alert("not selected");
}

i++
});
});