php ส่งเมล แบบ html มันใช้คอนเท้นแบบไหนน่ะครับ ผมลองใช้ตามหนังสือและตามเว๊บไซส์หลายเจ้าแล้วมันไม่ขึ้นเลยครับ

<table width="950" border="0" cellspacing="0" cellpadding="0">
      <tr>
        <th width="344" rowspan="24" scope="col"><img src="../../Them/contact-us.jpg" width="347" height="346" /></th>
        <th width="123" scope="col">&nbsp;</th>
        <th width="244" scope="col">&nbsp;</th>
        <th width="239" scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th colspan="2" scope="col"><h2 align="left" class="style2"></h2><h3 align="left" class="style2"></h3></th>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <td colspan="2" scope="col" align="left"><span class="style1 style2"></span></td>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <td colspan="2" scope="col"></td>
        <td scope="col">&nbsp;</td>
      </tr>
      <tr>
        <td colspan="2" scope="col"></td>
        <td rowspan="3" scope="col">&nbsp;</td>
      </tr>
      <tr>
        <td colspan="2" scope="col"><div align="left"><span class="style3">กรอกแบบฟอร์มเพื่อฝากข้อความของคุณไว้กับเรา</span></div></td>
      </tr>
      <tr>
        <td colspan="2" scope="col">&nbsp;</td>
        </tr>
      <tr>
      
              <script language="javascript">
function fncSubmit()
{
	if(document.frmMain.txtSubject.value == "")
	{
		alert('คุณยังไม่ได้เขียนหัวเรื่อง');
		document.frmMain.txtSubject.focus();
		return false;
	}
			if(document.frmMain.txtFormName.value == "")
	{
		alert('คุณยังไม่ได้กรอกชื่อะ');
		document.frmMain.txtFormName.focus();		
		return false;
	}
				if(document.frmMain.txtFormEmail.value == "")
	{
		alert('คุณไม่ได้ใส่ที่อยู่อีเมล');
		document.frmMain.txtFormEmail.focus();		
		return false;
	}					
		if(document.frmMain.txtDescription.value == "")
	{
		alert('เขียนรายละเอียดด้วยค่ะ');
		document.frmMain.txtDescription.focus();		
		return false;
	}
	document.frmMain.submit();
}
</script>

        <td colspan="2" rowspan="16" align="left" valign="top" scope="col"><form method="post"  name="frmMain" action="contact_sendmail.php"  onclick="JavaScript:return fncSubmit();" >
          <table width="365" height="310" border="0" cellpadding="0" cellspacing="0">
            <tr>
              <td width="82" scope="col"><span class="style4">หัวข้อ</span></td>
              <td width="240" scope="col"><input type="text" name="txtSubject" size="40" maxlength="100" style="border:hidden;color:#DDC020;background:#E7F1FA" /></td>
            </tr>
            <tr>
              <td class="style4">จากคุณ</td>
              <td><input type="text" name="txtFormName" size="40" maxlength="100" style="border:hidden;color:#DDC020;background:#E7F1FA" /></td>
            </tr>
            <tr>
              <td class="style4">อีเมล</td>
              <td><input type="text"  name="txtFormEmail" size="40" maxlength="100" style="border:hidden;color:#DDC020;background:#E7F1FA" /></td>
            </tr>
            <tr>
              <td class="style4">รายละเอียด</td>
              <td rowspan="5" align="left" valign="top"><textarea name="txtDescription" cols="40" rows="7"></textarea></td>
            </tr>
            <tr>
              <td><input type="hidden" name="txtTo" value="[email protected]" /></td>
              </tr>
            <tr>
              <td>&nbsp;</td>
              </tr>
            <tr>
              <td height="39">&nbsp;</td>
              </tr>
            <tr>
              <td height="22">&nbsp;</td>
            </tr>
            <tr>
              <td>&nbsp;</td>
              <td align="left" valign="top"><div align="center">
                <input type="image" src="../../Them/submit.gif" value="ยืนยันข้อมูล" />
              </div></td>
            </tr>
          </table>
        </form></td>
        <td scope="col">&nbsp;</td>
      </tr>
      <tr>
        <td scope="col">&nbsp;</td>
      </tr>
      <tr>
        <td scope="col">&nbsp;</td>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <th scope="col">&nbsp;</th>
      </tr>
      <tr>
        <td colspan="2" scope="col" align="center" class="style1"></td>
        <td scope="col">&nbsp;</td>
      </tr>
    </table>

โค๊ด
<?
	$strTo = $_POST["txtTo"];
	$strSubject = $_POST["txtSubject"];
	$strHeader = "Content-type: text/html; charset=windows-874\n"; // or UTF-8 //
	$strHeader .= "From: ".$_POST["txtFormName"]."<".$_POST["txtFormEmail"].">\nReply-To: ".$_POST["txtFormEmail"]."";
	$strMessage = nl2br($_POST["txtDescription"]);
	$flgSend = @mail($strTo,$strSubject,$strMessage,$strHeader);  // @ = No Show Error //
	if($flgSend)
	{
	?>
	 		 <script>
			 alert("ยืนยันการส่งข้อมูล");
					window.location="index.php";
			</script>
			<?
	}
	else
	{
		echo "<center>คุณส่งข้อมูลไม่ผ่าน  กรุณากลับไปทำรายการใหม่.</center>";
	}
?>