Utilisation d'un fieldset de ExtJs

<textarea name="NouveauChampCalcule_champcalcule1_tofh" class="classe" title=""  id="area"  rows="4" cols="20">texte </textarea>

<script type="text/javascript">


Ext.onReady(function(){

   
   
    /*
     * CheckGroup example
     **/
    var checkGroup = { 
        	
        xtype: 'fieldset',
        title: 'Fieldset collapsible (initially collapsed)',
        autoHeight: true,
        layout: 'form',
        collapsed: true,   // initially collapse the group
        collapsible: true,
        items: [{
		   
            xtype: 'textfield',
            name: 'txt-test3',
            fieldLabel: 'Alignment Test',
            anchor: '95%'
        }]
    };
     

    // combine all that into one huge form
    var fp = new Ext.FormPanel({
	   
        title: 'Check/Radio Groups Example',
        frame: true,
        labelWidth: 110,
        width: 600,
        renderTo:'form-ct',
        bodyStyle: 'padding:0 10px 0;',
        items: [
          
            checkGroup
            
        ]
    });
	
	applyTo:'area'

});










</script>