<!-- 
function preload() {
 var img01 = new Image();
 var img02 = new Image();
 var img03 = new Image();
 img01.src = "images/btn_site-entry_on.gif";
 img02.src = "images/btn_navi_on.gif";
 img03.src = "images/btn_bbs_on.gif";
 }

// -->