var corner1;
var corner2;
var corner3;
			
function divs() {
	corner1 = document.getElementById("corner1");
	corner2 = document.getElementById("corner2");
	corner3 = document.getElementById("corner3");
}

function rollover1 () {
	corner1.style.visibility = "visible";
}
				
function rollout1() {
	corner1.style.visibility = "hidden";
}

function rollover2 () {
	corner2.style.visibility = "visible";
}
				
function rollout2() {
	corner2.style.visibility = "hidden";
}

function rollover3 () {
	corner3.style.visibility = "visible";
}
				
function rollout3() {
	corner3.style.visibility = "hidden";
}