Email Button on View Page

Can anyone help me with this one? I am learning MySQL and PHP but have limited skill...
What I am trying to do is add a 'Send Email' Button on the View Page using visual editor then using the EVENT 'View Page:before process'.

When a user clicks the send email button on the view page, it emails the current record view and the user name of who clicked the button it to the admin (static email).

After all the time I have wasted on this I would be prepared to donate my kidney for a solution....Am I doing this all wrong?
Here is my code.
//code for the button

echo "<INPUT class=button type=button value=\"&nbsp;&nbsp;Send Email Notification&nbsp;&nbsp;\" onclick='window.location=\"TableName_view.php?editid1=".$_REQUEST["editid1"]."&mail=yes\"'>";
//code for View Page:before process

global $conn;

$str = "select * from TableName where ID=".$_REQUEST["editid1"];

$rs = db_query($str,$conn);

$data = db_fetch_array($rs);

if ($_REQUEST["mail"]=="yes")

{

// ** Send email ****

$adminemail="admin@email.com";

$useremail = $data["useremail"];

foreach($values as $field=>$value)

$message.= $field." : ".$value."\r\n";

mail($adminemail, $subject, $message);

mail($useremail, $subject, $message);

//** Redirect to another page ****

header("Location: TabkeName_list.php");

exit();

}