function getEmailById(id, element)
{
  var callback = function(data, status) 
  { 
	$(element).attr('href', 'mailto:'+data.email);
  };
  $.post("getemail.php",{'id':id}, callback, "json");
}

function getEmailByTag(tag, element)
{
  var callback = function(data, status) 
  { 
	$(element).attr('href', 'mailto:'+data.email);
  };
  $.post("getemail.php",{'tag':tag}, callback, "json");
}