a1=new Image(45,45)
a1.src="images/but-a.gif"
a2=new Image(45,45)
a2.src="images/but-a-sm.gif"

b1=new Image(45,45)
b1.src="images/but-b.gif"
b2=new Image(45,45)
b2.src="images/but-b-sm.gif"

c1=new Image(45,45)
c1.src="images/but-c.gif"
c2=new Image(45,45)
c2.src="images/but-c-sm.gif"

d1=new Image(45,45)
d1.src="images/but-d.gif"
d2=new Image(45,45)
d2.src="images/but-d-sm.gif"

e1=new Image(45,45)
e1.src="images/but-e.gif"
e2=new Image(45,45)
e2.src="images/but-e-sm.gif"

f1=new Image(45,45)
f1.src="images/but-f.gif"
f2=new Image(45,45)
f2.src="images/but-f-sm.gif"

g1=new Image(45,45)
g1.src="images/but-g.gif"
g2=new Image(45,45)
g2.src="images/but-g-sm.gif"

h1=new Image(45,45)
h1.src="images/but-h.gif"
h2=new Image(45,45)
h2.src="images/but-h-sm.gif"

i1=new Image(45,45)
i1.src="images/but-i.gif"
i2=new Image(45,45)
i2.src="images/but-i-sm.gif"

j1=new Image(45,45)
j1.src="images/but-j.gif"
j2=new Image(45,45)
j2.src="images/but-j-sm.gif"

k1=new Image(45,45)
k1.src="images/but-k.gif"
k2=new Image(45,45)
k2.src="images/but-k-sm.gif"

l1=new Image(45,45)
l1.src="images/but-l.gif"
l2=new Image(45,45)
l2.src="images/but-l-sm.gif"

m1=new Image(45,45)
m1.src="images/but-m.gif"
m2=new Image(45,45)
m2.src="images/but-m-sm.gif"

n1=new Image(45,45)
n1.src="images/but-n.gif"
n2=new Image(45,45)
n2.src="images/but-n-sm.gif"

o1=new Image(45,45)
o1.src="images/but-o.gif"
o2=new Image(45,45)
o2.src="images/but-o-sm.gif"

p1=new Image(45,45)
p1.src="images/but-p.gif"
p2=new Image(45,45)
p2.src="images/but-p-sm.gif"

q1=new Image(45,45)
q1.src="images/but-q.gif"
q2=new Image(45,45)
q2.src="images/but-q-sm.gif"

r1=new Image(45,45)
r1.src="images/but-r.gif"
r2=new Image(45,45)
r2.src="images/but-r-sm.gif"

s1=new Image(45,45)
s1.src="images/but-s.gif"
s2=new Image(45,45)
s2.src="images/but-s-sm.gif"

t1=new Image(45,45)
t1.src="images/but-t.gif"
t2=new Image(45,45)
t2.src="images/but-t-sm.gif"

u1=new Image(45,45)
u1.src="images/but-u.gif"
u2=new Image(45,45)
u2.src="images/but-u-sm.gif"

v1=new Image(45,45)
v1.src="images/but-v.gif"
v2=new Image(45,45)
v2.src="images/but-v-sm.gif"

w1=new Image(45,45)
w1.src="images/but-w.gif"
w2=new Image(45,45)
w2.src="images/but-w-sm.gif"

x1=new Image(45,45)
x1.src="images/but-x.gif"
x2=new Image(45,45)
x2.src="images/but-x-sm.gif"

y1=new Image(45,45)
y1.src="images/but-y.gif"
y2=new Image(45,45)
y2.src="images/but-y-sm.gif"

z1=new Image(45,45)
z1.src="images/but-z.gif"
z2=new Image(45,45)
z2.src="images/but-z-sm.gif"


function filter(imagename,objectsrc){
if (document.images)
document.images[imagename].src=eval(objectsrc+".src")
}