//画像イメージ実体の生成
if(document.images){
   var img01_on = new Image();
   var img01_off = new Image();
   var img02_on = new Image();
   var img02_off = new Image();
   var img03_on = new Image();
   var img03_off = new Image();
   var img04_on = new Image();
   var img04_off = new Image();
   var img05_on = new Image();
   var img05_off = new Image();
   var img06_on = new Image();
   var img06_off = new Image();
   var img07_on = new Image();
   var img07_off = new Image();
   var img08_on = new Image();
   var img08_off = new Image();
   var img09_on = new Image();
   var img09_off = new Image();
}
//画像の割り当てプリロード
function preLoad(){
   img01_on.src="../../nurse/images/menu_koukoku02.gif";
   img01_off.src="../../nurse/images/menu_koukoku01.gif";
   img02_on.src="../../nurse/images/menu_site02.gif";
   img02_off.src="../../nurse/images/menu_site01.gif";
   img03_on.src="../../nurse/images/menu_poli02.gif";
   img03_off.src="../../nurse/images/menu_poli01.gif";
   img04_on.src="../../nurse/images/menu_map02.gif";
   img04_off.src="../../nurse/images/menu_map01.gif";
   img05_on.src="../../nurse/images/menu_gaiyo02.gif";
   img05_off.src="../../nurse/images/menu_gaiyo01.gif";
   img06_on.src="../../nurse/images/button_touroku02.gif";
   img06_off.src="../../nurse/images/button_touroku.gif";
   img07_on.src="../../nurse/images/menu_rireki02.gif";
   img07_off.src="../../nurse/images/menu_rireki01.gif";
   img08_on.src="../../nurse/images/menu_toiawase02.gif";
   img08_off.src="../../nurse/images/menu_toiawase01.gif";
   img09_on.src="../../nurse/images/menu02_world02.gif";
   img09_off.src="../../nurse/images/menu02_world01.gif";
}
//マウスカーソルがのったときの処理
function rollon(img){
   imgon=eval(img+"_on.src");
   if ((document.images)&&(imgon)){
        document.images[img].src=eval(img+"_on.src");
   }
}
//マウスカーソルが外れたときの処理
function rolloff(img){
   imgoff=eval(img+"_off.src");
   if ((document.images)&&(imgoff)){
        document.images[img].src=eval(img+"_off.src");
   }
}