About DateItem Display

[fancycgx3650]

I use the code below, and the month show that 'jan, feb, mar.....'
and how to show the month with '1,2,3,4,5,6....'

var dfDateItemYM=isc.DynamicForm.create({
		autoDraw:false,
		fields:[
			{name:"date", type:"date", selectorFormat:"YM", showPickerIcon:false, 
		setItems:function () {this.Super("setItems", arguments); this.width=120;}
							}
		]
	});