function check()
{
if(document.guestbook.Guest_Name.value=="")
{
alert("请填写您的姓名");
document.guestbook.Guest_Name.focus();
return false
}
if(document.guestbook.Guest_TEL.value=="")
{
alert("请填写您的电话");
document.guestbook.Guest_TEL.focus();
return false
}
if(document.guestbook.Content.value=="")
{
alert("请填写反馈内容");
document.guestbook.Content.focus();
return false
}
if(document.guestbook.checkcode.value=="")
{
alert("请填写验证码");
document.guestbook.checkcode.focus();
return false
}
if(document.guestbook.checkcode.value.length==0)
{
alert("验证码不能为空");
document.guestbook.checkcode.focus();
return false;
}
return true;
}
