Help with php mail form

[hisdivinedesign]

I am new to using PHP and I am trying to do a PHP mail form with validation check. When the user misses a field or clicks submit I want the message to come up on the same page, no going to another page, and if it's a missed field I'd like it to keep the data which the person has already input. Below is the code I have now for a page I call contact1. php - problem is, I uploaded it and when I tried to test it, I get nothing but a blank page. Haven't even gotten to actually testing the form yet so that may be a whole new issue after I get the page working. Can anyone help? .........thank you Michelle

body tag....
div tags (have some stuff written in html before the form) - close div tags
object tag - for an swf file - closed object tag

div style="position: absolute; width: 389px; height: 100px; z-index: 6; left:596px; top:243px" id="layer5"
<h3> Contact Us </h3>

<?php
if ( $POST['send'] == "[e-mail]" && $POST['name'] != "" && $POST['email'] != "" && $POST['subject'] != "" && $POST['Reason'] != "" && $POST['message'] != ""){
echo "<p class="one">Thank you for contacting us. Someone will respond as soon as possible.<br />
received name: " . $POST["name"] . "<br /> Age: " .$POST["email"] </p>;
}else{

?>

<form name="contact" method="post" action="<?php $_SERVER['PHP_SELF'] ?>">

<?php
if ( $POST['send'] && $POST['name'] == ""){
echo "<span style=\"color:white;\">Please enter your name</span><br />";
}
?>
<label for="name"><p class="one">Your Name:</p></label>
<input type="text" name="name" id="name" value="<?php echo $_POST['name'] ?>" /><br /><br />

<?php
if ( $POST['send'] && $POST['email'] == ""){
echo "<span style=\"color:white;\">Email address is required</span><br />";
}
?>
<label for="email"><p class="one">Your Email:</p></label>
<input type="text" name="email" id="email" value="<?php echo $_POST['email'] ?>" /><br /><br />

<?php
if ( $POST['send'] && $POST['subject'] == ""){
echo "<span style=\"color:white;\">A subject is required.</span><br />";
}
?>
<label for="email"><p class="one">Subject:</p></label>
<input type="text" name="subject" id="subject" value="<?php echo $_POST['subject'] ?>" /><br /><br />

Reason:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<select name="reason">
<option value="1">General Feedback</option>
<option value="2">Advertising</option>
<option value="3">Privacy Issues</option>
<option value="4">Other</option>
</select><br>

<?php
if ( $POST['send'] && $POST['email'] == ""){
echo "<span style=\"color:white;\">Email address is required</span><br />";
}
?>
<label for="email"><p class="one">Your Message:</p></label>
<textarea name="message" id="message" value="<?php echo $_POST['email'] ?>" cols="30" rows="8" /></textarea><br /><br />

<input type="submit" name="submit" value="Contact Us"></p>
</form>

<?php
}
?>

div...more html etc..etc... /div
script - a script for a rotating banner blah blah /script

end body tag
end html tag

[CoderDan]

your form action target is missing the 'echo'.
the value pre-population with post data should be htmlentities( $_POST['field'], ENT_QUOTES ) to ensure values like Jimmy "the grin" mc'lachlan doesn't corrupt the html.
there is no posted name of 'send' in the form, however you are using it as teh check for error messages. (this is probably your main problem)
every label is for 'email'.
rather than putting the class on a p tag inside a label tag, why not just style the label tag?

[djjjozsi]

using qoutes has rules.
bad technique:

echo "<p class="one">Thank you for contacting us. Someone will respond as soon as possible.<br />
received name: " . $_POST["name"] . "<br /> Age: " .$_POST["email"] </p>; 

better technique:

<p class="one">Thank you for contacting us. Someone will respond as soon as possible.<br />
received name: <?php echo htmlspecialchars($_POST["name"]); ?><br /> Age: <?php echo htmlspecialchars($_POST["email"]); ?> </p> 

If you need to print clean html codes, you should break out from the php tag and html codes will be passed. If you're using WYSIWYG editors, the html codes will appears.