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I want a layers in workspace in combo box.Once i select combo box i want attribute in selected layer to in other combo box. how can i do it. I am using geoserver, openlayers, Geoext and ext js.

Can any one just help me

my combo box code is:

            var simpleCombo = Ext.create('Ext.form.field.ComboBox', {
                fieldLabel: 'Select layer Name',
                displayField: 'name',
                width: 320,
                labelWidth: 100,
                store: store3,
                queryMode: 'local',
                emptyText:'Layer Selection',
                typeAhead: true,
                listeners : {
                    'select' : function(){
                        var selValW = this.getValue();

                            txtquery(selValW);
                }}
            });  
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