Try this :

var result = str.replace(country.data + ';','');

Try this :

var result = str.replace(country.data + ';','');

Thanks to comments, this should work more efficently :

var tmp = str.replace(country.data ,''); 
var result = tmp.replace(';;' ,';');

Try this :

var result = str.replace(country.data,'');

Try this :

var result = str.replace(country.data + ';','');