<script language="JScript">

attachEvent('onclick',fnClick);
attachEvent('onmouseover',fnMouseover);
attachEvent('onmouseout',fnMouseout);

function fnClick()
{ 
  if ( this.nextSibling.style.display!="block" )
  { this.nextSibling.style.display="block";
    this.style.backgroundImage="url(expcol/minus.gif)";
  }
  else
  { this.nextSibling.style.display="none";
    this.style.backgroundImage="url(expcol/plus.gif)";
  }
}

function fnMouseover()
{ this.style.textDecoration="underline";
}
function fnMouseout()
{ this.style.textDecoration="none";
}

</script>