var FormMessage = "<TABLE cellSpacing='1' cellPadding='4' width='100%' align='center' class='table_guestbook_bg2'>"
FormMessage = FormMessage + "<TR class='table_guestbook_bg3'><TD width='28%' align='right' valign='top'>您的姓名:</TD><TD><INPUT name='Name' class='input_form_full' id='Name' size='24' maxlength='30'/></TD></TR>";
FormMessage = FormMessage + "<TR class='table_guestbook_bg3'><TD width='28%' align='right' valign='top'>地址:</TD><TD><INPUT name='Address' class='input_form_full' id='Address' size='24' maxlength='50'/></TD></TR>";
FormMessage = FormMessage + "<TR class='table_guestbook_bg3'><TD width='28%' align='right' valign='top'>电子邮件:</TD><TD><INPUT name='Email' class='input_form_full' id='Email' size='24' maxlength='50'/></TD></TR>";
FormMessage = FormMessage + "<TR class='table_guestbook_bg3'><TD width='28%' align='right' valign='top'>联系电话:</TD><TD><INPUT name='Tel' class='input_form_full' id='Tel' size='24' maxlength='50'/></TD></TR>";
FormMessage = FormMessage + "<TR class='table_guestbook_bg3'><TD width='28%' align='right' valign='top'>留言标题:</TD><TD><INPUT name='Title' class='input_form_full' id='Title' size='24' maxlength='50'/></TD></TR>";
FormMessage = FormMessage + "<TR class='table_guestbook_bg3'><TD width='28%' align='right' valign='top'>您的留言内容:</TD><TD><textarea name='Message' rows='6'  cols='23' class='input_form_full' id='Message'></textarea></TD></TR>";
FormMessage = FormMessage + "</TABLE>";
document.writeln (FormMessage);
function validate_form()
{        var p, num;
        if (GuestBook.Name.value.length<1){
                alert("请填写您的姓名!");
                  GuestBook.Name.select();
                  GuestBook.Name.focus();
                return false;
        }
        if (GuestBook.Address.value.length<1){
                alert("请填写地址!");
                  GuestBook.Address.select();
                  GuestBook.Address.focus();
                return false;
        }   
        if (GuestBook.Email.value.length>50 || GuestBook.Email.value =="" ){
                alert("请填写有效的电子邮箱!");
                  GuestBook.Email.select();
                  GuestBook.Email.focus();
                return false;
        }else{
                p=GuestBook.Email.value.indexOf("@");
                if (p < 1 || p == (GuestBook.Email.value.length - 1)){
                alert("请填写有效的电子邮箱!");
                  GuestBook.Email.select();
                  GuestBook.Email.focus();
                return false;
                }
         }       
        if (GuestBook.Tel.value.length<1){
                alert("请填写联系电话!");
                  GuestBook.Tel.select();
                  GuestBook.Tel.focus();
                return false;
        }
        if (GuestBook.Title.value.length<1){
                alert("请填写留言标题!");
                  GuestBook.Title.select();
                  GuestBook.Title.focus();
                return false;
        }
        if (GuestBook.Message.value.length<1){
                alert("请填写留言内容!");
                  GuestBook.Message.select();
                  GuestBook.Message.focus();
                return false;
        }
        if (GuestBook.Message.value.length>490){
                alert("留言内容字数太多!");
                  GuestBook.Message.select();
                  GuestBook.Message.focus();
                return false;
        }
}