Sdata / JSON doesnt work locally only externally.

Hello,

I have a small JSON script which retrieves a list of records. This script works perfectly when CRM is accessed externally but doesnt work at all when CRM is accessed internally. By internally, i mean accessing CRM locally on a machine (PC or server) where it is installed.

I am just curious why that is and is it possible to make it work locally?

Sample Code:

function retrieve(var1)
{

var successCompany = function(crmRecord)

{
alert(crmRecord[0].air_name);
$('#air_project').val(crmRecord[0].air_name);
}

crm.sdata({
entity: "Aircraft",
where: "air_name like ' + var1 + '",
success: successCompany
});