$.ui.component.subclass('ui.page', {
	_init: function() {
		var self = this, 
			options = this.options, 
			page = (this.page) = self.element, 
			pageHeader = this.pageHeader = page.find('.' + options.headerClass), 
			pageBody = this.pageBody = page.find('.' + options.bodyClass), 
			pageFooter = this.pageFooter = page.find('.' + options.footerClass);
		this.createCommonSignInForm();
	}, 
	createCommonSignInForm: function() {
		this.commonSignInForm = this.pageHeader.find('#common_sign_in_form').form();
	}, 
	getBodyObject: function(selector) {
		return this.pageBody.find(selector);
	}
});
$.ui.page.defaults.extend(
	{
		headerClass: 'page-header', 
		bodyClass: 'page-body', 
		footerClass: 'page-footer'
	}
);