var furnitureimages = new Array("desk1.jpg", "desk2.jpg", "recep.jpg");
var stationeryimages = new Array("stapler.jpg", "pins.jpg", "pen.jpg");

var arrayindex = 0;

function rotateimg(category)
{
	if(category == 1)
	{
		images = furnitureimages;
	}
	if(category == 2)
	{
		images = stationeryimages;
	}
	if(category == 3)
	{
		images = stationeryimages.concat(furnitureimages);
	}
	arrayindex ++;
	if(arrayindex == images.length)
	{
		arrayindex = 0;
	}
	document.getElementById("dec").src = "/images/banners/rotate/"+images[arrayindex];
}