function only_num(o, r) {
  var s = o.value;
  var s2 = "";
  var cs = "0123456789" + (r ? ".," : "");
  var err = false;
	for (var i = 0; i < s.length; i++) { 
    if 
      (cs.indexOf(s.charAt(i)) >= 0) 
    { 
        s2 += s.charAt(i); 
    } else {
      err = true; 
    }
  }
	if (err) o.value = s2;
}
    $(document).ready(function(){      
    $('#slideshow').cycle({
        fx:     'fade',
        speed:  'slow',
        timeout: 7000
        //pager:  '#nav',
    });
  });