function ajax_check(input_value, input_name, code0, code1, code2, code3, code4) {
          
                   
                
               
                $.post("js/ajax_check.php",{checker:input_value, checker_name:input_name, code0:code0, code1:code1, code2:code2, code3:code3, code4:code4}, function(data) {
                    
                    if (input_name != 'quantity')  {  
                            
                    if(data) {
                    $('form input#'+input_name+'_input').removeClass('input input_ok').addClass('input_error');  //remove old class from input field and add error class
                    $('#'+input_name+'_tick').css({'display' : 'none'});
                    $('#'+input_name+'_cross').css({'display' : 'block'});
                    $('div#error_'+input_name).css({'display' : 'block'});
                    $('div#error_'+input_name).text(data);
                    }
                    else {
                    $('form input#'+input_name+'_input').removeClass('input input_error').addClass('input_ok');  //remove old class from input field and add error class
                    $('div#error_'+input_name).css({'display' : 'none'});
                    $('#'+input_name+'_cross').css({'display' : 'none'});
                    $('#'+input_name+'_tick').css({'display' : 'block'});
                    }
                     
                    }
                    
                    else {
                    if(data) {
                    $('div#error_'+input_name).css({'display' : 'block'});
                    $('div#error_'+input_name).text(data);
                    }
                    else {
                  
                    $('div#error_'+input_name).css({'display' : 'none'});
                    }
                    }
                    
                });

}