var n3 = false;
image1 = new Image();
image1.src = "images/xml.gif";
image1on = new Image();
image1on.src = "images/xml-ng.gif"

image2 = new Image();
image2.src = "images/xml.gif";
image2on = new Image();
image2on.src = "images/xml-ng.gif"

image3 = new Image();
image3.src = "images/rds.gif";
image3on = new Image();
image3on.src = "images/rds-ng.gif"

image4 = new Image();
image4.src = "images/rds.gif";
image4on = new Image();
image4on.src = "images/rds-ng.gif"

function on3(name)
{
 document[name].src = eval(name + "on.src");
}

function off3(name)
{
 document[name].src = eval(name + ".src");
}

n3 = true;
function on(name)
{
 if (n3)
 on3(name);
}

function off(name)
{
 if (n3)
 off3(name);
}