window.onload = int;
function int(){
	
	
var popupBtn = document.getElementById("craig");	
var popupWindow = document.getElementById("popupWindow");
var closeBtn = document.getElementById("closeBtn");
popupBtn.onmousedown = function(){
popupWindow.className = "visible";
return false;
}
closeBtn.onmousedown = function(){
popupWindow.className = "invisible";
return false;
}
}