JSON을 이용한 AJAX 처리

 function value_check(){

     var request = createRequest(); // XMLHttpRequest 객체 생성

     request.onreadystatechange = function (event) {

     if(request.readyState == 4) {

         if(request.status == 200 ){

             var json = eval('(' + request.responseText + ')');
     
             var product_sn = json['product_serial_no'];
             var buy_y = json['buy_year];
             var buy_m = json['buy_month];
             var buy_d = json['buy_day];
         }
     }

     };
     request.open('GET','customer_product_chk.asp?product_idx=' + $("#serial_number").val() ,true);
     request.send();     
 }

 
 // XMLHttpRequest 객체 생성
 function createRequest(){
     var request;

     try {
         request = new XMLHttpRequest();
     } catch ( exception) {
          try{
              request = new ActiveXObject('Msxml2.XMLHTTP');
          } catch( innerException){
              request = new ActiveXObject('Microsoft.XMLHTTP');
          }
      }
      return request;
 }