s1_on = new Image();
s1_on.src = "img/servicess1on.gif";
s2_on = new Image();
s2_on.src = "img/servicess2on.gif";
s3_on = new Image();
s3_on.src = "img/servicess3on.gif";

s1_off = new Image();
s1_off.src = "img/servicess1.gif";
s2_off = new Image();
s2_off.src = "img/servicess2.gif";
s3_off = new Image();
s3_off.src = "img/servicess3.gif";