var pageRegistration = {
	div_ids: {
		dateField: 'field_birthdate'
	},

	init: function() {

// Set prameters for min size of date
		d_min = new Date();
		d_min.setYear(d_min.getFullYear() - 100);
		d_min.setMonth(12);
		d_min.setDate(31);

// Set prameters for max size of date
		d_max = new Date();
		d_max.setYear(d_max.getFullYear() - 7);
		d_max.setMonth(12);
		d_max.setDate(31);

		this.date_field = new Ext.form.DateField({
				applyTo : this.div_ids['dateField'],
//				minValue : d_min,
//				maxValue : d_max,
				width : 100,
				format : 'm/d/Y'
		});
	}

};
Ext.onReady(pageRegistration.init, pageRegistration, true);