Basic ajax jQuery

function query(){
    $.ajax({    
        type : 'get',        
        dataType : 'html',
        data : null,
        url : 'query.php',    
        success : function(r){
            $('#result').html(r);
        }    
    });                
}

function insert(){
    $.ajax({
        type : 'post',
        dataType : 'html',
        data : 'code='+$('#std_code_input').val()+ 
                      '&name='+$('#std_name_input').val()+
                      '&grade='+$('#std_grade_input').val(),
        url : 'insert.php',    
        success : function(){
            query();
        }
    });
}
 
/*
* $.ajax : global variable jquery 
* type : method type (get, post ,...)
* dataType : request data type from server (html, javascript, json, ...)
* data : data for send to server (pattern : data1='x'&data2='y'&data3='z'&data(n) ... or null)
* url : page for request data 
* success : feedback function,  execute when send and get data from server success
*             not response from server 
*                success : function(){
*              
*                }
*             response from server 
*                 success : function(r){
*                     execute(r);
*                } 
*/