  <!--
  
    if(document.images)
    {
      causes_on = new Image();
      causes_on.src = 'images/causesbua.gif';
      causes_off = new Image();
      causes_off.src = 'images/causesbu.gif';
      
      heroin_on = new Image();
      heroin_on.src = 'images/heroinbua.gif';
      heroin_off = new Image();
      heroin_off.src = 'images/heroinbu.gif';
      
      cocaine_on = new Image();
      cocaine_on.src = 'images/cocainebua.gif';
      cocaine_off = new Image();
      cocaine_off.src = 'images/cocainebu.gif';
  
      crack_on = new Image();
      crack_on.src = 'images/crackbua.gif';
      crack_off = new Image();
      crack_off.src = 'images/crackbu.gif';
      
      marijuana_on = new Image();
      marijuana_on.src = 'images/marijuanabua.gif';
      marijuana_off = new Image();
      marijuana_off.src = 'images/marijuanabu.gif';
    
      addiction_on = new Image();
      addiction_on.src = 'images/addictionbua.gif';
      addiction_off = new Image();
      addiction_off.src = 'images/addictionbu.gif';
      
      treatment_on = new Image();
      treatment_on.src = 'images/treatmentbua.gif';
      treatment_off = new Image();
      treatment_off.src = 'images/treatmentbu.gif';
    }
    
    function rollOver(iName,iState)
    {
      if(document.images)
      {
        document.images[iName].src = eval(iName + '_' + iState + '.src');
      }
    }
  // -->