if(document.images){
 var onimg=new Array("/images/header_navi_mail_b.jpg","/images/side_left_navi_01b.jpg","/images/side_left_navi_02b.jpg","/images/side_navi_btn01b.jpg","/images/side_navi_btn02b.jpg","/images/side_navi_rss_b.gif")
 var offimg=new Array("/images/header_navi_mail_a.jpg","/images/side_left_navi_01a.jpg","/images/side_left_navi_02a.jpg","/images/side_navi_btn01a.jpg","/images/side_navi_btn02a.jpg","/images/side_navi_rss_a.gif")
 var onsel=new Array();
 var offsel=new Array();
 for (i=0; i<onimg.length; i++){
 onsel[i]=new Image();
 offsel[i]=new Image();
 onsel[i].src=onimg[i];
 offsel[i].src=offimg[i];
}
}
function onSelect(n){
 if(document.images){
     document.images["imge" + n].src=onsel[n].src;
}
}
function offSelect(n){
 if(document.images){
     document.images["imge" + n].src=offsel[n].src;
}
}