var images = [ // list images
["/images/home-a.png","/images/home-b.png","/images/home-c.png"], // link 1
["/images/corp-a.png","/images/corp-b.png","/images/corp-c.png"], // link 2
["/images/rotor-a.png","/images/rotor-b.png","/images/rotor-c.png"], // link 3
["/images/gen-a.png","/images/gen-b.png","/images/gen-c.png"], // link 4
["/images/prop-a.png","/images/prop-b.png","/images/prop-c.png"], // link 5
["/images/risk-a.png","/images/risk-b.png","/images/risk-c.png"], // link 6
["/images/pers-a.png","/images/pers-b.png","/images/pers-c.png"],  // link 7
["/images/subOne_01-a.png","/images/subOne_01-b.png","/images/subOne_01-b.png"],  // link 8
["/images/subTwo_01-a.png","/images/subTwo_01-b.png","/images/subTwo_01-b.png"],  // link 9
["/images/subThree_01-a.png","/images/subThree_01-b.png","/images/subThree_01-b.png"] // no comma at the end of the last index // link 10
]

var preloadImages=new Array() // preloads images
for(var i=0;i<images.length;i++) {
preloadImages[i]=new Array()
for(var j=0;j<images[i].length;j++){
preloadImages[i][j]=new Image()
preloadImages[i][j].src=images[i]
}
}

lastN = ""
lastPic=""

function mOver(obj){
num=obj.name.replace(/[^0-9]/g,"")
if(lastN != obj.name){
document.images[obj.name].src = (images[num].length==3?images[num][1]:images[num][2])
}
}

function mOut(obj){
num=obj.name.replace(/[^0-9]/g,"")
if(lastN != obj.name){
document.images[obj.name].src = images[num][0]
}
}

function mActive(obj){
if(typeof obj!="string"){obj=obj.name}
num=obj.replace(/[^0-9]/g,"")

document.images[obj].src = images[num][2]
if(lastN != ""&&lastN != obj){
document.images[lastN].src = lastPic
}
lastN = obj
lastPic=images[num][0]
}