// JavaScript Document

$(function(){
	// Full background
	checkWindowSize();
	$(window).resize(checkWindowSize);
});

function checkWindowSize(){
	// 1280*743
	var wHeight = $(window).height();
	if(wHeight>743){
		var wWidth = wHeight*1280/743;
		$('#mainBG img').attr({'width':wWidth, 'height': wHeight});
	}else{
		$('#mainBG img').attr({'width': 1280, 'height': 743});
	}
}