function hideSquare() {
    if (!document.getElementById) return;
    if (document.viralform.refercheck.checked){
		obj = document.getElementById("square");
    obj.style.display="block";
	}
	else{
	obj = document.getElementById("square");
    obj.style.display="none";
	}
}

function showSquare() {
    if (!document.getElementById) return;
    obj = document.getElementById("square");
    obj.style.display="block";
}