var onImg = new Array();
var offImg = new Array();


var navImgDir = "http://www41.pair.com/reformwi/images/header/";

var topNavNames = new Array("1","2","3","4","5","6","7");
var imgName, imgHLName, refName;
if (document.images) {   
  for (var i = 0; i < topNavNames.length; i++) {
    refName = topNavNames[i];
    imgName = navImgDir + refName + "_off.gif";
	imgHLName = navImgDir + refName + "_on.gif";
	onImg[refName] = new Image();
	offImg[refName] = new Image();
	onImg[refName].src = imgHLName;
	offImg[refName].src = imgName;
  }
}

function imageOn(name) {
   if (document.images) {
    document.images[name].src = onImg[name].src
   }
}

function imageOff(name) {
   if (document.images) {
    document.images[name].src = offImg[name].src
   }
}