function on(imgName)
{
	var image = document.getElementById(imgName);

	image.src = "graphics/on" + imgName + ".gif";
}

function off(imgName)
{
	var image = document.getElementById(imgName);
	
	image.src = "graphics/off" + imgName + ".gif";
}

//------------------------------------------------popup windows

//-create popup window arrays
var win = new Array(10);

//-open a popup window
function makeWindow(i,contents,winname,params)
{
	//if (!win[i]) { 
	//	win[i]=window.open('',winname,params);
	//} else {
	//	if ((winname == null) && (winname.closed)) win[i]=window.open('',winname,params);
	//}
	win[i]=window.open('',winname,params);
	win[i].location=contents;
	win[i].focus();
}

//-close popup windows 0-j when parent unloads
function closeWindows(j)
{
	for(i=0; i<=j; i++)
	if (win[i]) win[i].close();
}

//-close self popup window when parent id no longer matches
function closeMe(id)
{
	if (!opener.windowid) close();
	else if (opener.windowid!=id) close();
}