var  w = screen.width;
	var css_a = '<style type="text/css"><!--';
	if(location.href == "http://i-yuho.com/index.html" || location.href == "http://i-yuho.com/"){	
		if( w > 1281 ){
			css_a += 'html{background-image:url(./image/background.jpg);	background-repeat:no-repeat;}	--></style>';
		}
		else{
			css_a += 'html{background-image:url(./image/background_mini.jpg);	background-repeat:no-repeat;}	--></style>';
		}
	}
	else{
		if( w > 1281 ){
			css_a += 'html{background-image:url(./image/contents_background.jpg);	background-repeat:no-repeat;	background-color:#ffffcc;}	--></style>';
		}
		else{
			css_a += 'html{background-image:url(./image/contents_background_mini.jpg);	background-repeat:no-repeat;	background-color:#ffffcc;}	--></style>';
		}
	}
	document.write(css_a);