JS popup and php (need some help)

Hi,

I’m using a web form with php. I want, that when user clicks submit button and it will be an error (some fields will be empty) then I want it to show a little popup window… A simple javascript popup window generator don’t fits me, because I have a php function:

[CODE]<?php if( !$isHideForm ):
global $sErr ;
if( $sErr )
print “<br><a name=’error’></a><center><font class=’form_error’ >
$sErr</font></center><br> HERE SHOULD BE MY AUTO POPUP WINDOW”;
$starColor = $sErr ? “#ff0000” : “#000000″;
$style=” class=’form_text’ “; ?>[/CODE]

Any suggestions?

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