onchange form submit not working

[wxdqz]

ive tried everything here, its not doing anything, no errors, no nothing

<SELECT name="search_result" onChange="document.forms[0].submit();">

ive also tried:
document.form1.submit()
form1.submit()
form.submit()
document.form1.submit();
form1.submit();
form.submit();

whats going on here??? thanks for any help guys...