How to open a new popup windows?

function spamcheck($field)
  {
  //filter_var() sanitizes the e-mail
  //address using FILTER_SANITIZE_EMAIL
  $field=filter_var($field, FILTER_SANITIZE_EMAIL);

  //filter_var() validates the e-mail
  //address using FILTER_VALIDATE_EMAIL
  if(filter_var($field, FILTER_VALIDATE_EMAIL))
    {
    return TRUE;
    }
  else
    {
    return FALSE;
    }
  }
?>

PHP:

<?php

if (isset($_REQUEST['email']) && $_REQUEST['email'] != "")
//if "email" is filled out, send email
{
	$mailcheck = spamcheck($_REQUEST['email']);
  	if(!checkEmail($_POST['email']) && $mailcheck==FALSE)
	{
		//check if the email address is invalid
		echo("<script language='JavaScript'>
		window.alert('Unvalid email! Please correct it.')
		</script>"); 
		echo "<form method='post' action=''>    
		<table border='0' cellpadding='0' cellspacing='5' style='padding-left:10px' class='contactform'>
		<tr>
		<th colspan='2' style='font-size:13px; padding:5px; padding-left:0px; text-decoration:underline'>Contact Us Form</th>
		</tr>
		<tr>
		<td>Email</td>
		<td> : </td>
		<td><input name='email' type='text' class='text' size='30'></td>
		</tr>
		<tr>
		<td>Subject</td>
		<td> : </td>
		<td><select name='subject' style='width:154px'>
			<option value='General'>General</option>
			<option value='Enquiry'>Enquiry</option>
			</select>
		</td>
		</tr>
		<tr>
		<td>Message</td>
		<td> : </td>
		<td><textarea name='message' rows='6' cols='50'></textarea></td>
		</tr>
		<tr>
		<td colspan='2'><input name='sendemail' type='hidden' class='text' value='1' /></td>
		<td style='padding-top:5px'><input type='submit' name='btnSubmit' value='Submit' style='vertical-align:bottom' /></td>
		</tr>
		</table>
		</form>";
					
	}else{
  //send email
		  $email = $_POST['email'] ;
		  $subject = $_POST['subject'];
		  $message = $_POST['message'] ;
		  
		  
		  mysql_query("INSERT INTO feedback(fb_from,fb_subject,fb_content) VALUES ('". $email ."','".$subject."','".$message."')");
		  
		  	if(mysql_affected_rows() == 1){
				echo("<script language='JavaScript'>
				window.alert('General/Enquiry have been sent! Thank you.')
				</script>");
			}else{
                echo("<script language='JavaScript'>
                window.alert('Failed!')
                </script>"); 
			}

	}
}else
	//if "email" is not filled out, display the form
{
  
	echo "<form method='post' action=''>    
		<table border='0' cellpadding='0' cellspacing='5' style='padding-left:10px' class='contactform'>
		<tr>
		<th colspan='2' style='font-size:13px; padding:5px; padding-left:0px; text-decoration:underline'>Contact Us Form</th>
		</tr>
		<tr>
		<td>Email</td>
		<td> : </td>
		<td><input name='email' type='text' class='text' size='30'></td>
		</tr>
		<tr>
		<td>Subject</td>
		<td> : </td>
		<td><select name='subject' style='width:154px'>
			<option value='General'>General</option>
			<option value='Enquiry'>Enquiry</option>
			</select>
		</td>
		</tr>
		<tr>
		<td>Message</td>
		<td> : </td>
		<td><textarea name='message' rows='6' cols='50'></textarea></td>
		</tr>
		<tr>
		<td colspan='2'><input name='sendemail' type='hidden' class='text' value='1' /></td>
		<td style='padding-top:5px'><input type='submit' name='btnSubmit' value='Submit' style='vertical-align:bottom' /></td>
		</tr>
		</table>
</form>";
}
?>

PHP:

I want to write a page for give customer send feedback form. After submit the form will send mail but i using localhost so i change to another way. Once i fill up the form and submit. It will popup a new windows display subject,message,email(once submit it will insert a query and will delete after display) and the page for feedback form still remain as the fill in form. How to do that can anyone help?

 

var newWindow = window.open('page.html', 'windowname', 'width=570,height=500,toolbar=no,scrollbars=yes,resizable=yes,location=no,directories=no');

newWindow.focus();

 

When you declare the form put target="_black" and it will open in a new window. On that page after the form processes you can output the information.