ajax post json

var list = {
	"province" : province,
	"city" : city,
	"county" : county
}
$.ajax({
	url : "postOption",
	type : "post",
	contentType : "application/json",
	dataType : "json",
	data : JSON.stringify(list),
	success : function(res){
		console.log(res);
	}
})