function trim(s) {
	return s.replace(/(^\s*)|(\s*$)/g, "");
}


function ismobile(s) {
  var re = /^13\d{9}$/g||/^15[8,9]\d{8}$/g;
  return re.test(s)
}


function ismail(s) {
  var re = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
  return re.test(s)
}