function startRequest() {
var queryString;
var mobile = document.getElementById('mobile').value;
queryString = "mobile=" + mobile +"&action=mobile";
creatXMLHttpRequest();
xmlHttp.open("POST","?action=mobile","true");
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
xmlHttp.send(queryString);
}