Example of front-end js calling background method_javascript skills

public string AA(string cc)

{

string dd = "Hello everyone is really good";

string message=dd cc;
return message;

}

function Init() {
var v = "China";
var s = '<%=AA("' v '") %>';
alert(s);
}

$.post("PVISAjax.aspx", { Method: "PLANT", PlantName: plantName }, function (data) {
if (data != null) {
list = new Array(); //Split characters
list = data.split(",");
var gfoN = list[0];
var grfoN = list[1];
var elN = list[2];
var ulN = list[3];
var etbaN = list[4];
gfo.SetValue(gfoN);
grfo.SetValue(grfoN);
exeuro.SetValue(elN);
exusd.SetValue(ulN);
etba.SetValue(etbaN);
pvisName.SetValue(etbaN);
etba.mainElement.title = etbaN;
}
});