function expand(object) 
{
 var x=document.getElementById(object + "Child");
 if (x.style.display == "" || x.style.display == 'none') {
  x.style.display = 'block'; 
  document.getElementById(object).style.background="url('ProjectionsList/Pictures/ArrowDown.png') no-repeat 0px";
  }
 else {
  if (x.style.display == 'block') {
   x.style.display = 'none'; 
   document.getElementById(object).style.background="url('ProjectionsList/Pictures/ArrowRight.png') no-repeat 0px";
  }
 }
}