if (document.images) 

ideaOff = new Image
ideaOff.src = "img/navi01.gif"

ideaOn = new Image
ideaOn.src = "img/navi1.gif"


historyOff = new Image
historyOff.src = "img/navi02.gif"

historyOn = new Image
historyOn.src = "img/navi2.gif"


accessOff = new Image
accessOff.src = "img/navi03.gif"

accessOn = new Image
accessOn.src = "img/navi3.gif"


jobOff = new Image
jobOff.src = "img/navi04.gif"

jobOn = new Image
jobOn.src = "img/navi4.gif"


sitemapOff = new Image
sitemapOff.src = "img/navi05.gif"

sitemapOn = new Image
sitemapOn.src = "img/navi5.gif"


userOff = new Image
userOff.src = "img/navi06.gif"

userOn = new Image
userOn.src = "img/navi6.gif"


contactOff = new Image
contactOff.src = "img/navi07.gif"

contactOn = new Image
contactOn.src = "img/navi7.gif"


kitaOff = new Image
kitaOff.src = "../img/menu01.gif"

kitaOn = new Image
kitaOn.src = "../img/menu1.gif"


helperOff = new Image
helperOff.src = "img/menu02.gif"

helperOn = new Image
helperOn.src = "img/menu2.gif"


careOff = new Image
careOff.src = "img/menu03.gif"

careOn = new Image
careOn.src = "img/menu3.gif"


kaguyaOff = new Image
kaguyaOff.src = "img/menu04.gif"

kaguyaOn = new Image
kaguyaOn.src = "img/menu4.gif"


kintarouOff = new Image
kintarouOff.src = "img/menu05.gif"

kintarouOn = new Image
kintarouOn.src = "img/menu5.gif"


function chgImg(imgField,newImg) {
         if (document.images) {
                document[imgField].src= eval(newImg + ".src")
                }
         }