var Upgradecheck = {
      init : function()
      {
        $jq('#btnCheckSerialNumber').click( Upgradecheck.run );
      },
      
      initFormular : function()
      {
        $jq('#response').removeClass( 'ok' );
        $jq('#response').removeClass( 'warning' );
      },
      
      run : function()
      {
        $jq.post( 
          'memory_upgrade_check', 
          { 'sn' : $jq('#serialNumber').val() }, 
          Upgradecheck.response, 
          'json' 
        );
      },
      
      response: function( data, textStatus )
      {
        var responseDiv = $jq('#response');
        responseDiv.empty();

        if ( !data.isValid || !data.isAllowed )
        {
          responseDiv.addClass( 'warning' );
          responseDiv.removeClass( 'ok' );
        }
        else
        {
          responseDiv.addClass( 'ok' );
          responseDiv.removeClass( 'warning' );
        }

        for( var i=0; i<data.text.length; i++ )
        {
          $jq('<p>').html( data.text[i] ).appendTo( responseDiv );
        }
        
        var table = $jq('<table>').attr( 'id', 'upgradeInfo' );
        
        if ( data.offers )
        {
          var header = $jq('<tr>').addClass('upgrade');
          $jq('<th>').html( 'Product Code' ).appendTo( header );
          $jq('<th>').html( 'Description' ).appendTo( header );
          $jq('<th>').html( 'List Price (Euro)' ).appendTo( header );
          $jq('<th>').html( 'List Price (USD)' ).appendTo( header );
          header.appendTo( table );

          for( var i=0; i<data.offers.length; i++ )
          {
            var offer = data.offers[i];
            var line = $jq('<tr>');
            var productCode = $jq('<td>').html( offer.productCode ).appendTo( line );
            var productDescription = $jq('<td>').html( offer.description ).appendTo( line );
            var priceEuro = $jq('<td>').html( offer.priceEuro + ' €' ).appendTo( line ); 
            var priceDollar = $jq('<td>').html( '$ ' + offer.priceDollar ).appendTo( line );
            table.append( line );
          }
          responseDiv.append( table );
        }
      }
    }