[underW]

да работает все:

Ext.onReady(function(){

    var simple = new Ext.FormPanel({
        		url:'save-form.php',
        		frame:true,
        		width: 350,
              	items: [{
              		xtype:'textfield',
                	fieldLabel: 'test',
                	name: 'test',
                 	listeners: {
                			specialkey: 
                				function(field, e){
                       				if (e.getKey() == e.ENTER) {
                        				field.ownerCt.getForm().submit({
    										failure: 
    											function(form, action) {/*do something if all wrong:(*/},
                        					success: 
    											function(form, action) {window.location.href = ''; /*I so happy :)*/}
    									})
                        			}
                				}
            		}
                
            	}]});

    simple.render(document.body);
    
})