<html>
<body>
<form action="Send_Contact_Us.php" method="post" onSubmit="return checkform(this);">
<label>Name</label>
<input name="name" type="text" required="required" />
<label>Email</label>
<input name="mail" type="email" required="required" />
<label>Phone</label>
<input type="text" name="phone" pattern="[789][0-9]{9}" required="required" />
<label>Comments</label>
<textarea name="comment" rows="3" cols="20" required="required"></textarea>
<label for="code">Write code below <span id="txtCaptchaDiv" style="color:#F00"></span>
<!-- this is where the script will place the generated code -->
<br/>
<input type="hidden" id="txtCaptcha" />
</label>
<input type="text" name="txtInput" id="txtInput" size="30" onfocus="validatePass(document.getElementById('txtCaptcha'), this);" oninput="validatePass(document.getElementById('txtCaptcha'), this);" />
<input type="submit" />
</form>
</body>
</html>
这是我想使用JavaScript在文本字段上方生成代码的表单代码.