if(document.images){
 var onimg=new Array("/images/top_navi_01b.jpg","/images/top_navi_02b.jpg","/images/top_navi_03b.jpg","/images/top_navi_04b.jpg","/images/top_navi_05b.jpg","/images/top_navi_06b.jpg","/images/top_navi_07b.jpg","/images/top_navi_08b.jpg","/images/top_navi_09b.jpg","/images/top_navi_10b.jpg","/images/top_navi_11b.jpg","/images/top_navi_12b.jpg","/images/top_navi_13b.jpg","/images/top_navi_14b.jpg","/images/top_navi_15b.jpg","/images/top_navi_16b.jpg","/images/top_navi_17b.jpg","/images/top_navi_18b.jpg")
 var offimg=new Array("/images/top_navi_01a.jpg","/images/top_navi_02a.jpg","/images/top_navi_03a.jpg","/images/top_navi_04a.jpg","/images/top_navi_05a.jpg","/images/top_navi_06a.jpg","/images/top_navi_07a.jpg","/images/top_navi_08a.jpg","/images/top_navi_09a.jpg","/images/top_navi_10a.jpg","/images/top_navi_11a.jpg","/images/top_navi_12a.jpg","/images/top_navi_13a.jpg","/images/top_navi_14a.jpg","/images/top_navi_15a.jpg","/images/top_navi_16a.jpg","/images/top_navi_17a.jpg","/images/top_navi_18a.jpg")
 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;
}
}