[jQuery] How to add vars to my data object

[jQuery] How to add vars to my data object


I've been searching but couldn't find how to add variables to my data
object.
I want to make an ajax requst with $.ajax, but before i do that, i
want to 'build' the myDatavar.
That looks something like this:
-----------------------------------------------------------------------
var myDatavar = { name:'woutse', age:'91'} ;
var obj = document.getElementsByName('country');
for(i=0;i<obj.length;i++)
{
if (obj[i].type=='text')
{
if (obj[i].value!=obj[(i-1)].value)
     {
/// U can see what im trying to de here,
but this doesnt work
     var t = { 'ctr['+obj[i].alt+'] tr' : obj[i].value };
        $.merge(myDatavar , t);
}
}
}
    $.ajax({
     type: 'POST',
     url:'http://www.tinpay.nl/textadmin/save/',
     data: myDatavar,
     dataType: 'text',
     success: function(data) { refreshData(); },
     error: function () {    alert('error');    }
    });
So, how to add data to a object-variable?
thanks in advance,
woutse