Calling page method from JQUERY not working in Safari

function setVariables(city, area, date, pooja, isInstant) {
    
    $.ajax({
        type: "POST",
        url: "Default.aspx/setVariables",
        data: "{city: '" + city + "',area:'" + area + "',date: '" + date + "', pooja: '" + pooja + "',isInstant:' " + isInstant + "'}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: OnsetVariablesSuccess,
        failure: function (response) {
           
        }
    });
}

function OnsetVariablesSuccess(response) {

   
    if (response.d == 1) {
      
    }


}