//３日間だけupを表示
function newMark(y,m,d)
{
	oldDay=new Date(y+"/"+m+"/"+d);
	newDay=new Date();
	n=(newDay-oldDay)/(1000*60*60*24);
	if(n<=3) document.write("<img src='_image/a_up.gif' border='0'>");
 }