function SetBackgroundColor( sObject, sColor )
{
 if( !document.all ) return false;
 
 var objLink = document.all[ sObject ];
 if( !objLink || !objLink.style ) return false;
 
 objLink.style.backgroundColor = sColor;

 return true;
}

function OnSlideChange( iSlideNum )
{
 var iSlide = 1;
 while( SetBackgroundColor( "slide" + iSlide, "transparent" ) )
 {
  ++iSlide;
 }
  
 SetBackgroundColor( "slide" + iSlideNum, "#ffffcc" );
}