function addEvent(obj, evType, fn){ 
 if (obj.addEventListener){ 
   obj.addEventListener(evType, fn, false); 
   return true; 
 } else if (obj.attachEvent){ 
   var r = obj.attachEvent("on"+evType, fn); 
   return r; 
 } else { 
   return false; 
 } 
}
addEvent(window, 'load', foo);

function foo()
{
var corner = document.createElement("a");

corner.id		= "corner-999518";
corner.innerHTML 	= "We need your help: 999518.org";
corner.href		= "http://www.999518.org";
corner.style.display	= "block";
corner.style.position	= "absolute";
corner.style.top	= "0px";
corner.style.right	= "0px";
corner.style.backgroundColor	= "red";
corner.style.color	= "white";
corner.style.fontWeight	= "bold";
corner.style.fontSize	= "17px";
corner.style.fontFamily	= "Arial";
corner.style.padding	= "5px 7px";
document.body.appendChild(corner);
}