var a,b,c,n,x,y,z,v;

function imgSwap(){
a=document.getElementById("imgOne");
b=document.getElementById("imgTwo");
n=setInterval("flipFlop()",2000);
x=document.getElementById("link1");
y=document.getElementById("link2");
}
function flipFlop(){
a.style.visibility="hidden";
b.style.visibility="visible";
c=a;
a=b;
b=c;
x.style.visibility="hidden";
y.style.visibility="visible";
z=x;
x=y;
y=z;
}
window.onload=imgSwap();