header error

im trying to create add gallery page on seperate include page which has a form then goes to choose_gallery page

i have record set
and i have validation set
<?php
if ((((isset($_POST["add-gallery-yes"]))?$_POST["add-gallery-yes"]:"") != "")) {
$WAFV_Redirect = "";
$_SESSION['WAVT_choosegallery_875_Errors'] = "";
if ($WAFV_Redirect == "") {
$WAFV_Redirect = $_SERVER["PHP_SELF"];
}
$WAFV_Errors = "";
$WAFV_Errors .= WAValidateNM($totalRows_gallery . "",-1,0,"",",.",true,1);

if ($WAFV_Errors != "") {
PostResult($WAFV_Redirect,$WAFV_Errors,"choosegallery_875");
}
}
?>


on the choose_gallery page im trying to show Error div if record exists
<?php
if ("".((isset($_POST["galleryname"]))?$_POST["galleryname"]:"") ."" == "".$row_gallery[''] ."") { // WebAssist Show If
?>
<div id="error"><?php echo((isset($_COOKIE["gallery_name"]))?$_COOKIE["gallery_name"]:"") ?></div>
<?php
} // ("".((isset($_POST["galleryname"]))?$_POST["galleryname"]:"") ."" == "".$row_gallery[''] ."")
?>

i also want to show the name which allready exists
im getting these errors
Cannot modify header information - headers already sent by (output started at /home/content/96/8026696/html/admin_cms/choose_gallery.php:2) in /home/content/96/8026696/html/webassist/form_validations/wavt_scripts_php.php on line 83

the error is because there is a blank space at the end of line 1:
"<?php if(!session_id()) session_start(); ?> "

delete the space at the end of that code.

see this thread for more details:
showthread.php?t=19285

ho do i show the gallery name in tht div from the form

well, in the show region behavior, you have select the gallery name column from the gallery recordset.

and instead of using a cookie value to show the gallery name, use either the gallery form element or the recordset.