//JavaScript utilities' function
function isValidEmail(textObj){
  	var pattern = /\w(\w|\.|_|-)*@\w(\w|_|-)*\.\w(\w|\.)*/;
  	if(!pattern.test(textObj.value)){
  	  alert("无效的邮件地址！");
  	  textObj.focus();
  	  return false;
  	}
  	return true;
}

function isValidPhone(textObj){
  	var pattern = /(0\d{2,3}-?(\d{6,9})|13\d{9}|[^01]\d{5,8})/;
  	if(!pattern.test(textObj.value)){
  	  alert("无效的电话号码！");
  	  textObj.focus();
  	  return false;
  	}
  	return true;
}

function swapClassName(obj,clsName){
  obj.className = clsName;
}