if (document.images) 

{

var s1off = new Image();  s1off.src = "pic/m1t.gif";
var s1on = new Image();  s1on.src = "pic/m1t_on.gif";

var v1off = new Image();  v1off.src = "pic/m1b.gif";
var v1on = new Image();  v1on.src = "pic/m1b_on.gif";

var s2off = new Image();  s2off.src = "pic/m2t.gif";
var s2on = new Image();  s2on.src = "pic/m2t_on.gif";

var v2off = new Image();  v2off.src = "pic/m1b.gif";
var v2on = new Image();  v2on.src = "pic/m1b_on.gif";

var s3off = new Image();  s3off.src = "pic/m3t.gif";
var s3on = new Image();  s3on.src = "pic/m3t_on.gif";

var v3off = new Image();  v3off.src = "pic/m1b.gif";
var v3on = new Image();  v3on.src = "pic/m1b_on.gif";

var s4off = new Image();  s4off.src = "pic/m4t.gif";
var s4on = new Image();  s4on.src = "pic/m4t_on.gif";

var v4off = new Image();  v4off.src = "pic/m1b.gif";
var v4on = new Image();  v4on.src = "pic/m1b_on.gif";

var s5off = new Image();  s5off.src = "pic/m5t.gif";
var s5on = new Image();  s5on.src = "pic/m5t_on.gif";

var v5off = new Image();  v5off.src = "pic/m2b.gif";
var v5on = new Image();  v5on.src = "pic/m2b_on.gif";



}

function change(img3Name)

{
if (document.images) 
	document[img3Name].src = eval(img3Name + 'on.src');
}

function release(img3Name)
{
if (document.images)
	document[img3Name].src = eval(img3Name + 'off.src');
}