function imgSwap(ImgId,ImgName)
{
	if(document.images) 
		document.images[ImgId].src = "images/" + ImgName;	
}

var nw
function popup(url, name, w, h, s)
{
  if (!nw || nw.closed)
  {
    nw = window.open(url, name,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=' + s + ',resizable=0, title=0,width=' + w + ',height=' + h);
    if(!nw.opener)
    {
      nw.opener
    }
    nw.document.close()
  } 
  else 
  {
	nw.close()
    nw = window.open(url, name,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=' + s + ',resizable=0, title=0,width=' + w + ',height=' + h);
    nw.focus()
  }
}