a1=new Image();
a1.src="./graphics/cross-buttonover.gif";
b1=new Image();
b1.src="./graphics/fresh-buttonover.gif";
c1=new Image();
c1.src="./graphics/events-buttonover.gif";
d1=new Image();
d1.src="./colleges/balliol.gif"
e1=new Image();
e1.src="./colleges/bnc.gif"
f1=new Image();
f1.src="./colleges/chch.gif"
g1=new Image();
g1.src="./colleges/ccc.gif"
h1=new Image();
h1.src="./colleges/exeter.gif"
i1=new Image();
i1.src="./colleges/hertford.gif"
j1=new Image();
j1.src="./colleges/jesus.gif"
k1=new Image();
k1.src="./colleges/keble.gif"
l1=new Image();
l1.src="./colleges/lincoln.gif"
m1=new Image();
m1.src="./colleges/lmh.gif"
n1=new Image();
n1.src="./colleges/magd.gif"
o1=new Image();
o1.src="./colleges/mansfield.gif"
p1=new Image();
p1.src="./colleges/merton.gif"
q1=new Image();
q1.src="./colleges/new.gif"
r1=new Image();
r1.src="./colleges/oriel.gif"
s1=new Image();
s1.src="./colleges/pmb.gif"
t1=new Image();
t1.src="./colleges/queens.gif"
u1=new Image();
u1.src="./colleges/regents.gif"
v1=new Image();
v1.src="./colleges/some.gif"
w1=new Image();
w1.src="./colleges/st-annes.gif"
x1=new Image();
x1.src="./colleges/stcatz.gif"
y1=new Image();
y1.src="./colleges/seh.gif"
z1=new Image();
z1.src="./colleges/sthildas.gif"
a2=new Image();
a2.src="./colleges/st-hughs.gif"
b2=new Image();
b2.src="./colleges/sjc.gif"
c2=new Image();
c2.src="./colleges/spc.gif"
d2=new Image();
d2.src="./colleges/trinity.gif"
e2=new Image();
e2.src="./colleges/univ.gif"
f2=new Image();
f2.src="./colleges/wadham.gif"
g2=new Image();
g2.src="./colleges/worc.gif"