Yes, Try below script to retrive line time,
var IMTEST = xfa.resolveNodes("$record.IM_TEST.DATA[*]");
var LV_DATA;
for (var i = 0; i < IMTEST.length; i++)
{
LV_DATA = xfa.resolveNode("$record.IM_TEST.DATA[" + INDX + "].FIELDNAME").value;
}
Where,
INDX : index of table record. (start from zero).
LV_DATA : variable to hold data
IM_TEST : context table variable (Import parameter variable)
FIELDNAME : name of field in internal table
for more javascript help use Adobe form using javascirpt
Hope this helps.