var imgAr = new Array();
var imgDir;

var ie4 = false;
var ns4 = false;
var ns6 = false;

if (document.all) {
  ie4 = true;
}
else if (document.layers) {
  ns4 = true;
}
else if (document.getElementById) {
  ns6 = true;
}

function imgObjConstr(iName, iW, iH, iWR, iHR)
{
	this.onImg = new Image(iW, iH);
	this.onImg.src = imgDir + iName + "on.gif";
	this.offImg = new Image(iWR, iHR);
	this.offImg.src = imgDir + iName + "of.gif";
}

function addImgObj(iName, iW, iH, iWR, iHR)
{
	imgAr[iName] = new imgObjConstr(iName, iW, iH, iWR, iHR);
}

function iOver(whichMenu)
{
	if (document.images)
	{
		document.images[whichMenu].src = imgAr[whichMenu].onImg.src;
	}
}

function iOut(whichMenu)
{
	if (document.images)
	{
		document.images[whichMenu].src = imgAr[whichMenu].offImg.src;
	}
}

function loadImgs()
{
	if (document.images)
	{
		imgDir = "images/";
		addImgObj("home", 155, 20, 155, 20);
		addImgObj("contct", 155, 20, 155, 20);
		addImgObj("yourdom", 155, 20, 155, 20);
	}
}

loadImgs();