function showHeight(){
	var wh = $(window).height();
	var ww = $(window).width();
	var dh = $('#contents').height();
	var hh = $('header').height();
	var fh = $('footer').height();
	
	var ch = dh + fh ;
	var th = dh + hh + fh ;
	
	if (ch < wh) {
		$('#wrap').css("height", (wh - fh - 35) + "px");
	} else {
		$('#wrap').css("height", (th - 35) + "px");
	};
	
	if (ww < 1040){
		$('body').css("background-position", "left bottom");
	} else {
		$('body').css("background-position", "center bottom");
	};

};

$(function(){
	showHeight();
	window.onresize = function(){
		showHeight();
	};
});