Try this approach: 1. MainForm.Script -> customizeUploadForm = function() { var _winUpload = Ext.WindowManager.getActive(); _winUpload.query('textarea')[0].hide(); _winUpload.query('button')[0].setStyle({ top: '85%' }); // cancel _winUpload.query('button')[1].setStyle({ top: '85%' }); // upload _winUpload.query('button')[1].setDisabled(true); _winUpload.q
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