function Common () {
	this.init();
}
Common.prototype.init = function () {
	this.resized();
	$(window).resize(this.resized);
}
Common.prototype.showNavigation = function () {
	$("body").append('<div id="navigation"></div>');
}
Common.prototype.hideNavigation = function () {
	$("#navigation").remove();
}
Common.prototype.resized = function () {
	_STAGE_WIDTH = $(window).width();
	var wH = $(window).height();
	_STAGE_HEIGHT = wH - 90;
	$("#stage").css("width", _STAGE_WIDTH + "px");
	$("#stage").css("height", _STAGE_HEIGHT + "px");
	$("#navigation").css("top", _STAGE_HEIGHT + "px");
}
var _STAGE_WIDTH;
var _STAGE_HEIGHT;
var cmn;
$(document).ready(function () {
	cmn = new Common();
});