if(document.images){
 var onimg=new Array("/images/header_img_mail_b.gif","/images/navi_01b.gif","/images/navi_02b.gif","/images/navi_03b.gif","/images/navi_04b.gif","/images/navi_05b.gif","/images/navi_06b.gif","/images/header_image_navi01b.jpg","/images/header_image_navi02b.jpg","/images/header_image_navi03b.jpg","/images/side_story_bottom_b.gif","/images/side_rss_b.gif","/images/footer_mail_b.gif","/images/more_tyumon_b.gif","/images/more_qa_b.gif")
 var offimg=new Array("/images/header_img_mail_a.gif","/images/navi_01a.gif","/images/navi_02a.gif","/images/navi_03a.gif","/images/navi_04a.gif","/images/navi_05a.gif","/images/navi_06a.gif","/images/header_image_navi01a.jpg","/images/header_image_navi02a.jpg","/images/header_image_navi03a.jpg","/images/side_story_bottom_a.gif","/images/side_rss_a.gif","/images/footer_mail_a.gif","/images/more_tyumon_a.gif","/images/more_qa_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;
}
}