function imgLoad( imgPath, name )
{
   if( document.images ) 
   {
      eval( name + "= new Image()" );
      eval( name + ".src  = '" + imgPath + "'" );
   }
}
function imgToggleON( imgName )
{ 
   imgToggle( imgName, 'on' ); 
}
function imgToggleOFF( imgName )
{ 
   imgToggle( imgName, 'off' ); 
}

function imgToggle( imgName, mode ) 
{
   if( document.images ) 
      document[ imgName ].src = eval( imgName + "_" + mode + ".src" );
   return true;
}