var myImg = [
	{idn:'04'}
];

var image = new Object();
for (i=0;i<myImg.length;i++) {
	image[myImg[i].idn + '_off'] = new Image();
	image[myImg[i].idn + '_off'].src = 'images/index_' + myImg[i].idn + '_off.gif';
	image[myImg[i].idn + '_on'] = new Image();
	image[myImg[i].idn + '_on'].src = 'images/index_' + myImg[i].idn + '_over.gif';
}

function imageOver (imageNum) {
	var imageObj = document.getElementById (imageNum);
	imageObj.src = image[imageNum + '_on'].src;
}

function imageOut (imageNum) {
	var imageObj = document.getElementById (imageNum);
	imageObj.src = image[imageNum + '_off'].src;
}