Can you give me please an example of a resizable Panel?

The code of my panel is the following:
PHP Code:
function getRFICartPanel(){
    var 
rfiCartPanel = new Ext.Panel({
        
title'RFI Cart',
        
id'rfiCartPanel',
        
collapsibletrue,
        
height200,
        
autoScrolltrue,
        
bodyStyle'padding: 5px',
        
contentEl'rfiCart',
        
iconCls'rfiCart'
    
});
    
    return 
rfiCartPanel;

Thanks in advance.