{
   a1 = new Image() ; a1.src = "index/arr_d.jpg";   a2 = new Image();
   a2.src = "index/arr_1.jpg" ;
}

function rollOver(imgDocID,imgObjName)
{
         if( document.images[imgDocID] )
  
       {
             document.images[imgDocID].src = eval(imgObjName + ".src");
         }
}

var layerRef = "null", styleSwitch = "null";
var OnDiv = "false";

   HM_DOM = (document.getElementById) ? true : false;
   HM_NS4 = (document.layers) ? true : false;

if (HM_NS4) {
  layerRef = "document.layers";
  styleSwitch = "";
  visiblevar = "show";
  hidevar = "hide";
}
else{
  if (HM_DOM)
    {
       styleSwitch=".style";
      visiblevar="visible";
      hidevar="hidden";
    }
    else
    {
      layerRef="document.all";
       styleSwitch=".style";
      visiblevar="visible";
      hidevar="hidden";
    }
  }

function showSub (name)
{
  if (HM_DOM)
    {
    eval('document.getElementById("'+name+'x")'+styleSwitch+'.visibility=visiblevar');
    }

  else
    {
    eval(layerRef+'["'+name+'x"]'+styleSwitch+'.visibility=visiblevar');
    }


  
  eval( 'rollOver( "'+name+'g","a2" )' );
}

function hideSub (name)
{
  namex = name;
  t = setTimeout("timecheck (namex)" , 5000);
}

function timecheck (name)
{
  if (!OnDiv
)
  {
  if (HM_DOM)
    {
    eval('document.getElementById("'+name+'x")'+styleSwitch+'.visibility=hidevar');
    }
 
 else
    {
    eval(layerRef+'["'+name+'x"]'+styleSwitch+'.visibility=hidevar');
    }


    eval( 'rollOver( "'+name+'g","a1")' );

  }
}

function hideall (num)
{
  for (i=1; i<num; i++)
    {
    if (HM_DOM)
      {
      eval('document.getElementById("name'+i+'x")'+styleSwitch+'.visibility=hidevar');
      }
  
 
 else
      {
      eval(layerRef+'["'+name+''+i+'x"]'+styleSwitch+'.visibility=hidevar');
      }

    eval( 'rollOver( "name'+i+'g","a1")' );
  }
}