ComboBox отправка value

[NickSun]

подскажите как отправить значение ComboBox. код:

new Ext.form.ComboBox({
		fieldLabel: 'Time Zone',
		typeAhead: true,
		name: 'time_zone',
		/*hiddenName: 'time_zone',
		hiddenValue: 'time_zone_value',*/
		submitValue : true,
		id: 'time_zone',
		triggerAction: 'all',
		lazyRender:true,
		mode: 'local',
		store: new Ext.data.ArrayStore({
			id: 0,
			fields: [
				'time_zone_value',
				'time_zone_str'
			],
			data: [
				['-12.0', '(GMT -12:00) Eniwetok, Kwajalein'],
				['-11.0', '(GMT -11:00) Midway Island, Samoa'],
				['-10.0', '(GMT -10:00) Hawaii'],
				['-9.0', '(GMT -9:00) Alaska'],
				['-8.0', '(GMT -8:00) Pacific Time (US & Canada)'],
				['-7.0', '(GMT -7:00) Mountain Time (US & Canada)'],
				['-6.0', '(GMT -6:00) Central Time (US & Canada), Mexico City'],
				['-5.0', '(GMT -5:00) Eastern Time (US & Canada), Bogota, Lima'],
				['-4.0', '(GMT -4:00) Atlantic Time (Canada), Caracas, La Paz'],
				['-3.5', '(GMT -3:30) Newfoundland'],
				['-3.0', '(GMT -3:00) Brazil, Buenos Aires, Georgetown'],
				['-2.0', '(GMT -2:00) Mid-Atlantic'],
				['-1.0', '(GMT -1:00 hour) Azores, Cape Verde Islands'],
				['0.0', '(GMT) Western Europe Time, London, Lisbon, Casablanca'],
				['1.0', '(GMT +1:00 hour) Brussels, Copenhagen, Madrid, Paris'],
				['2.0', '(GMT +2:00) Kaliningrad, South Africa'],
				['3.0', '(GMT +3:00) Baghdad, Riyadh, Moscow, St. Petersburg'],
				['3.5', '(GMT +3:30) Tehran'],
				['4.0', '(GMT +4:00) Abu Dhabi, Muscat, Baku, Tbilisi'],
				['4.5', '(GMT +4:30) Kabul'],
				['5.0', '(GMT +5:00) Ekaterinburg, Islamabad, Karachi, Tashkent'],
				['5.5', '(GMT +5:30) Bombay, Calcutta, Madras, New Delhi'],
				['5.75', '(GMT +5:45) Kathmandu'],
				['6.0', '(GMT +6:00) Almaty, Dhaka, Colombo'],
				['7.0', '(GMT +7:00) Bangkok, Hanoi, Jakarta'],
				['8.0', '(GMT +8:00) Beijing, Perth, Singapore, Hong Kong'],
				['9.0', '(GMT +9:00) Tokyo, Seoul, Osaka, Sapporo, Yakutsk'],
				['9.5', '(GMT +9:30) Adelaide, Darwin'],
				['10.0', '(GMT +10:00) Eastern Australia, Guam, Vladivostok'],
				['11.0', '(GMT +11:00) Magadan, Solomon Islands, New Caledonia'],
				['12.0', '(GMT +12:00) Auckland, Wellington, Fiji, Kamchatka']
			]
		}),
		valueField: 'time_zone_value',
		displayField: 'time_zone_str'
	})

вместо 4.5 уходит (GMT +4:30) Kabul

[VKS]

{
	xtype: 'combo',
	anchor: '95%',
	hiddenName: 'type',
	fieldLabel: 'Type',
	displayField: 'name',
	valueField: 'value',
	allowBlank: false,
	store: new Ext.data.SimpleStore({
		fields: ['name', 'value'],
		data: [ ['A', 'a'], ['B', 'b'], ['C', 'c'], ['D', 'd'] ]
	}),
	triggerAction: 'all',
	mode: 'local'
}

[NickSun]

{
	xtype: 'combo',
	anchor: '95%',
	hiddenName: 'type',
	fieldLabel: 'Type',
	displayField: 'name',
	valueField: 'value',
	allowBlank: false,
	store: new Ext.data.SimpleStore({
		fields: ['name', 'value'],
		data: [ ['A', 'a'], ['B', 'b'], ['C', 'c'], ['D', 'd'] ]
	}),
	triggerAction: 'all',
	mode: 'local'
}

как только указываю hiddenName: 'type', то селект улетает в левый верхний угол и перестает отображаться выбранное значение

[VKS]

Это уже не связано с комбобоксом