Thank you very much! Everything works just great! I had only to change 0 to 1 in javascript code (document.forms[0].action change to document.forms[1].action), because I had another form on the page.

I have another question concerning this second form. The form was created by means of Form Wizard from template Support. I entered my e-mail address into this form but when I preview the page and click Submit I have error: File not found. Firefox can't find the file at /C:/DOCUME~1/MyComputerName/LOCALS~1/Temp/preview/<? echo($_SERVER['PHP_SELF']);?>.