var pos_underscore2 = custnum_balance_status.indexOf('_',pos_underscore1+1);
var pos_underscore3 = custnum_balance_status.indexOf('_',pos_underscore2+1);
var custnum = custnum_balance_status.substring(0,pos_underscore1);
var pos_underscore2 = custnum_balance_status.indexOf('_',pos_underscore1+1);
var pos_underscore3 = custnum_balance_status.indexOf('_',pos_underscore2+1);
var custnum = custnum_balance_status.substring(0,pos_underscore1);