function checkData()
{
	var Username = document.FBForm.Username;
	var Company = document.FBForm.Company;
	var Address = document.FBForm.Address;
	var zw = document.FBForm.zw;
	var Tel = document.FBForm.Tel;
	var Email = document.FBForm.Email;
	var message = document.FBForm.message;
	if (Username.value=="")
	{
		alert("请填写联系人！")
		Username.focus();
		return false;
	}
	if (Company.value=="")
	{
		alert("请填写公司名称！")
		Company.focus();
		return false;
	}
	if (Address.value=="")
	{
		alert("请填写地址！")
		Address.focus();
		return false;
	}
	if (zw.value=="")
	{
		alert("请填写职位！")
		zw.focus();
		return false;
	}
	if (Tel.value=="")
	{
		alert("请填写电话！")
		Tel.focus();
		return false;
	}
	if (Email.value=="")
	{
		alert("请填写 Email")
		Email.focus();
		return false;
	}
	if(!isEmail(Email.value))
	{
		alert("Email 格式错误！")
		Email.focus();
		return false;
	}
	if (message.value=="")
	{
		alert("请填写留言内容！")
		message.focus();
		return false;
	}
	return true;
}

function isEmail(str){ 
var reg = /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/; 
return reg.test(str); 
}