chg1 = new Image();
bk1 = new Image();
chg1.src = "links/inv.gif";
bk1.src = "links/inv01.gif";

chg2 = new Image();
bk2 = new Image();
chg2.src = "links/video.gif";
bk2.src = "links/video01.gif";

chg02 = new Image();
bk02 = new Image();
chg02.src = "links/organ01.gif";
bk02.src = "links/organ.gif";

chg3 = new Image();
bk3 = new Image();
chg3.src = "links/scien.gif";
bk3.src = "links/scien01.gif";

chg4 = new Image();
bk4 = new Image();
chg4.src = "links/faculty.gif";
bk4.src = "links/faculty01.gif";

chg5 = new Image();
bk5 = new Image();
chg5.src = "links/exhibooth.gif";
bk5.src = "links/exhibooth01.gif";

chg6 = new Image();
bk6 = new Image();
chg6.src = "links/lucky.gif";
bk6.src = "links/lucky01.gif";

chg7 = new Image();
bk7 = new Image();
chg7.src = "links/social.gif";
bk7.src = "links/social01.gif";

chg8 = new Image();
bk8 = new Image();
chg8.src = "links/awards.gif";
bk8.src = "links/awards01.gif";

chg9 = new Image();
bk9 = new Image();
chg9.src = "links/sciexhi.gif";
bk9.src = "links/sciexhi01.gif";

chg10 = new Image();
bk10 = new Image();
chg10.src = "links/abtvar.gif";
bk10.src = "links/abtvar01.gif";

chg11 = new Image();
bk11 = new Image();
chg11.src = "links/reach.gif";
bk11.src = "links/reach01.gif";

chg12 = new Image();
bk12 = new Image();
chg12.src = "links/yoga.gif";
bk12.src = "links/yoga01.gif";

chg13 = new Image();
bk13 = new Image();
chg13.src = "links/discindia.gif";
bk13.src = "links/discindia01.gif";

chg14 = new Image();
bk14 = new Image();
chg14.src = "links/abstract.gif";
bk14.src = "links/abstract01.gif";

chg014 = new Image();
bk014 = new Image();
chg014.src = "links/apced01.gif";
bk014.src = "links/apced.gif";

chg15 = new Image();
bk15 = new Image();
chg15.src = "images/geninform01.gif";
bk15.src = "images/geninform.gif";

chg16 = new Image();
bk16 = new Image();
chg16.src = "images/regis01.gif";
bk16.src = "images/regis.gif";

chg17 = new Image();
bk17 = new Image();
chg17.src = "images/tarrifs01.gif";
bk17.src = "images/tarrifs.gif";

chg18 = new Image();
bk18 = new Image();
chg18.src = "images/home01.gif";
bk18.src = "images/home.gif";