document.body.onmouseover=makeCool;
document.body.onmouseout=makeNormal;
  
function makeCool() 
{
  src = event.toElement;
  if (src.tagName == "A") 
  {
    src.oldcol = src.style.color;
    src.style.color = "red";
  }
}

function makeNormal() 
{
  src=event.fromElement;
  if (src.tagName == "A") 
  {
    src.style.color = src.oldcol;
  }
}