fName = [
"http://images.apple.com/jp/education/students/voice/images/arrow_blue_next01.png",
"http://images.apple.com/jp/education/students/voice/images/arrow_blue_prev01.png"
];
prIMG = new Array();
for (i=0; i<fName.length; i++)
{
prIMG[i] = new Image();
prIMG[i].src = fName[i];
}
function setImgSrc(imgURL)
{
document.myIMG.src = imgURL;
}