function ChangeImages(direction)
{
	//all changing images are of same size
	Folder = "images/";
	TotalImages=8;
	DisplayImages=4;
	ImagePrefix="im_";
	ImageExtn=".jpg";

	
	currentSrc = m1.src;
	currentNo = currentSrc.substring(currentSrc.lastIndexOf('/')+ImagePrefix.length+1,currentSrc.lastIndexOf('.'));
	if(parseInt(currentNo) >TotalImages-DisplayImages && direction=="left" || parseInt(currentNo) < 2 && direction=="right")
	{
		return;
	}
	//enable or disable Left & Right images
	if(direction=="left")
	{
		right.src = Folder+"right2.gif";
		right.style.cursor = "hand";
		dir=1;
		if(parseInt(currentNo) == TotalImages-DisplayImages)
		{
			left.style.cursor = "default";
			left.src = Folder+"left1.gif";
		}
	}
	else
	{
		left.src = Folder+"left2.gif";
		left.style.cursor = "hand";
		dir=-1;
		if(currentNo==2)
		{
			right.style.cursor = "default";
			right.src = Folder+"right1.gif";
		}
	}
	// change images
	j = parseInt(currentNo) + dir;
	for(i=1;i<=DisplayImages;i++)
	{
		document["m"+i].src = Folder + ImagePrefix + j +ImageExtn;
		j++;
	}
}
function DisplayImage(imgName)
{
	Folder = "images/";
	ImagePrefix="im-";
	ImageExtn=".jpg";
	currentSrc = document[imgName].src;
	currentNo = currentSrc.substring(currentSrc.lastIndexOf('/')+ImagePrefix.length+1,currentSrc.lastIndexOf('.'));
	dispImg.src = Folder + ImagePrefix + currentNo +ImageExtn;
}