$(document).ready(function(){
  $(".tooltips").each(function(){
    $(this).prev()
    .mouseover( function(e){ $(this).next().show().css({ top: (e.pageY+20)+"px", left: (e.pageX+20)+"px"}); })
    .mousemove( function(e){ $(this).next().css({ top: (e.pageY+20)+"px", left: (e.pageX+20)+"px"}); })
    .mouseout(  function(e){ $(this).next().hide(); })
    .css({cursor: "help"});
  });

});

function mostragrafico(f, a) {
  var s="";
  for (x in a) {
    if (document.getElementById("sq"+a[x]).checked) {
      s+=((s=="")?""+a[x]:","+a[x]);
    }
  }
  document.getElementById("grafico").src="grafico.asp?pf="+f.pf.value+"&f="+f.f.value+"&s="+s+"&m="+Math.random();
}