Hello List,
I have got a selectfield with some categories and a form which contains that selectfield. this form contains somemore textfields. Now, i want to change the textfields by changing the categories. Is that possible?

that´s my selectfield by changing it i want to get k1,k2,k3 or k4
HTML Code:
storeKategorie = new Ext.data.JsonStore({
        fields: ['kategorie'],
        data: [
                {kategorie: "Bücher"},
                {kategorie: "Veröffentlichungen(Paper)"},
                {kategorie: "Vorträge"},
                {kategorie: "Internetauftritte"}                
              ]
    }); 
 
 
kategorieauswahl = new Ext.form.ComboBox({
                fieldLabel: 'Kategorie',
                id:"kategorie",
                store: storeKategorie, 
                displayField: 'kategorie',
                typeAhead: true,
                mode: 'local',
                triggerAction: 'all',
                emptyText:'Wählen Sie eine Kategorie...',
                selectOnFocus:false,
                anchor:'95%',
                editable: false
                 }); 
these are two of four possible options for the catogires
HTML Code:
k1 = [{
                    xtype:'textfield',
                    fieldLabel: 'Titel',
                    name: 'title',
                    anchor:'95%'
                },{
                    xtype:'textfield',
                    fieldLabel: 'Autor',
                    name: 'Autor',
                    anchor:'95%'
                },{
                    xtype:'textfield',
                    fieldLabel: 'Verlag',
                    name: 'verlag',
                    anchor:'95%'
                },{
                    xtype:'textfield',
                    fieldLabel: 'ISBN',
                    name: 'isbn',
                    anchor:'95%'
                },
                new Ext.form.DateField({
                fieldLabel: 'Datum',
                name: 'date',
                anchor:'95%',
                minValue: '01.01.1960',
                maxValue: '31.12.2050'
            })];
            
            
k2 = [{
                    xtype:'textfield',
                    fieldLabel: 'Titel',
                    name: 'title',
                    anchor:'95%'
                },{
                    xtype:'textfield',
                    fieldLabel: 'Autor',
                    name: 'Autor',
                    anchor:'95%'
                },{
                    xtype:'textfield',
                    fieldLabel: 'URL',
                    name: 'verlag',
                    anchor:'95%'
                },
                new Ext.form.DateField({
                fieldLabel: 'Datum',
                name: 'date',
                anchor:'95%',
                minValue: '01.01.1960',
                maxValue: '31.12.2050'
            })];
and here is the mainform which contains everything.
HTML Code:
top = new Ext.FormPanel({
        labelAlign: 'center',
        frame:true,
        autowidth: true,
        autoheight: true,
        items: [{
            layout:'column',
            items:[{
                columnWidth:.5,
                layout: 'form',
                items: [kategorieauswahl,k1] !!!!!!!here i want to change between k1-k4 by using the selectfield
            },{
                columnWidth:.5,
                layout: 'form',
                items: [{
                    html:'<img src="images/book_large.png" alt="Kategorie">'
                    }]
            }]
        },{
            xtype:'htmleditor',
            id:'bio',
            fieldLabel:'Beschreibung',
            height:500,
            anchor:'98%'
        }],

        buttons: [{
            text: 'Save'
        },{
            text: 'Cancel'
        }]
    });