Rolo = {};

Rolo.initializeCommon=function() {
	Rolo.updateBGImageSize();
	$(window).resize(Rolo.updateBGImageSize);
	$("#bk_container img").show();
	if(/chrome/.test( navigator.userAgent.toLowerCase() )) {
		$("header").hide();
		setTimeout(function(){ $("header").show(); }, 50);
	}
};

Rolo.updateBGImageSize = function() {
	var winWidth = $(window).width();
	var winHeight = $(window).height();
	var winRatio = winWidth / winHeight;
	var img = $("#bk_container img")[0];
	var imgWidth = $(img).width();
	var imgHeight = $(img).height();
	var imgRatio = imgWidth / imgHeight;
	var finalWidth = finalHeight = 0;
	if(winRatio < imgRatio) {
		finalHeight = winHeight;
		finalWidth = winHeight / imgHeight * imgWidth;
	} else {
		finalWidth = winWidth;
		finalHeight = winWidth / imgWidth * imgHeight;
	}
	$(img).css({"width": finalWidth + "px", "height": finalHeight + "px"});
};