function slideSwitch() {
             var $active = $('#slideshow img.active');
             if ( $active.length === 0 ) $active = $('#slideshow img:last');
             var $next =  $active.next().length ? $active.next() : $('#slideshow img:first');
             $active.addClass('last-active');
             $next.css({opacity: 0.0})
                 .addClass('active')
                 .animate({opacity: 1.0}, 1000, function() {
                     $active.removeClass('active last-active');
               });
         }
         $(function() {
             setInterval( "slideSwitch()", 4000 );
         });

function newMark(y,m,d)
{
	oldDay = new Date(y+"/"+m+"/"+d);
	newDay = new Date();
	n = (newDay - oldDay)/(1000*60*60*24);
	if (n <= 7) document.write("<img src='http://www.chushiganpro.jp/js/images/new.gif'>");
}