function addcomment(rgid)
{
   $('rg'+rgid).style.display="block";
}

function filtergraph()
{
   //alert("taxoffice: "+$('rid').value+"\nd1:"+$('d1').value+"\nd2:"+$('d2').value);
   if($('d2').value<$('d1').value)
     $('filtererror').innerHTML="ERROR: Date 1 can't be ahead of Date 2.";
   else
   {
     $('filtererror').innerHTML="&nbsp;";
     new Ajax.Request("getgraph.php?rid="+$('rid').value+"&d1="+$('d1').value+"&d2="+$('d2').value, {onComplete: 
     function(transport)
     {  
        if(transport.getHeader("content-type")=="text/html")
          $('filtererror').innerHTML=transport.responseText;
        else
          $('graph').src="getgraph.php?rid="+$('rid').value+"&d1="+$('d1').value+"&d2="+$('d2').value;
     }});
   }  
}

function resetgraph(rid)
{
    $('graph').src="graphs/"+rid+".png";
}