if (document.images)
{
	var image1_0 = new Image();
	image1_0.src = "images/img1.jpg";
	var image1_1 = new Image();
	image1_1.src = "images/img1On.jpg";
	
	var image2_0 = new Image();
	image2_0.src = "images/img2.jpg";
	var image2_1 = new Image();
	image2_1.src = "images/img2On.jpg";
	
	var image3_0 = new Image();
	image3_0.src = "images/img3.jpg";
	var image3_1 = new Image();
	image3_1.src = "images/img3On.jpg";
	
	var image4_0 = new Image();
	image4_0.src = "images/img4.jpg";
	var image4_1 = new Image();
	image4_1.src = "images/img4On.jpg";
	
	var image5_0 = new Image();
	image5_0.src = "images/img5.jpg";
	var image5_1 = new Image();
	image5_1.src = "images/img5On.jpg";
	
	var image6_0 = new Image();
	image6_0.src = "images/img6.jpg";
	var image6_1 = new Image();
	image6_1.src = "images/img6On.jpg";
	
	var image7_0 = new Image();
	image7_0.src = "images/img7.jpg";
	var image7_1 = new Image();
	image7_1.src = "images/img7On.jpg";
}

function rollOut(imgName) 
{
    if (document.images) 
    {
        document[imgName].src = eval(imgName+"_0.src");
    }
}

function rollIn(imgName)
{
    if (document.images)
    {
        document[imgName].src = eval(imgName+"_1.src");
    }
}