var theOn = new Array();
var theOff = new Array();

LoadServiceImage();
function LoadServiceImage() {
	var SWAP_LEN = 6;
	var SWAP_FILE_URI = '/service/images/';
	for(var i=0; i<SWAP_LEN; i++){
		num =i+1;
		theOn[i] = new Image();
		theOn[i].src = SWAP_FILE_URI+"m"+ num +'-on.gif';
		theOff[i] = new Image();
		theOff[i].src = SWAP_FILE_URI+"m"+ num +'-off.gif';
	}
}

function SwapServiceOn(num){
	var itemName="m"+num;
	num-=1;
	document[itemName].src  = theOn[num].src;
}

function SwapServiceOff(num){
	var itemName="m"+num;
	num-=1;
	document[itemName].src  = theOff[num].src;
}