browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 )) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )))
  
if (browser) 
{
	prefnormal = new MakeArray(2)
	prefover = new MakeArray(2)
	prefdescription = new MakeArray(2)
	prefblurb = new MakeArray(2)
	var prefDescriptionOut, descriptionImage;
	                               
	window.status = "Welcome to Aldat"
	          		
	prefnormal[1].src = "images/prev_off.jpg"
	prefnormal[2].src = "images/next_off.jpg"
	                	
	prefover[1].src = "images/prev_on.jpg"
	prefover[2].src = "images/next_on.jpg"
	                		
	prefdescription[1].src = "images/previous.jpg"
	prefdescription[2].src = "images/next.jpg"
	
	prefDescriptionOut = "images/clear_pixel.gif"
	descriptionImage = "portDescription";
	
	prefblurb[1] = "Previous portfolio"
	prefblurb[2] = "Next portfolio"
}

function MakeArray(n) 
{
	this.length = n
	for (var i = 1; i<=n; i++) 
	{
	    this[i] = new Image()
	}
	return this
}
function portover(num) 
{
	if (browser) 
	{ 
		loadImage = "portImage" + num;
		document.images[loadImage].src = prefover[num].src
		document.images[descriptionImage].src = prefdescription[num].src
		window.status = prefblurb[num]
	}
}
function portout(num) 
{
	if (browser)
	{
		loadImage = "portImage" + num;
		document.images[loadImage].src = prefnormal[num].src
		document.images[descriptionImage].src = prefDescriptionOut
		window.status = "Welcome to AldaT"
	}                   
}