Very easy question but driving me mad...

[arozzi]

I have a form with a LIst field(menu) item.
When I select an item I want it to automatically update instead of waiting until I press submit.
I tried to accomplish this with onChange()

I am very frustrated and have problem mixing php, HTML and javascript and ', " , and ;

What I ultimately want to do is to call the page.php with the values $cat and product but I don't know if this is possible.
My second option is to call a function but does that have to be a javascript or can it work with a php function as well...? and what do I write then???

<?php
$i=1;
print "<FORM method=GET action=page.php>";
print "<SELECT name=product onChange=showInfo()>";
while ($i < $num+1) {
$name=mysql_result($result,$i-1,"name");
print "<OPTION name=product choice value=$i onChange=showInfo()>$name</OPTION>";
$i++;
}
print "</SELECT>";
print "<INPUT type=hidden name=page value=info>";
print "<INPUT type=submit name=submit_button value=Visa>";
print "<INPUT type=hidden name=cat value=$cat>";

print "</FORM>";
if (session_is_registered("valid_user"))
echo "Valkommen $valid_user";
?>

Any help, very appreciated!!!

[tsinka]

Hi,

give the form a name and use onChange:

<?php 
$i=1; 
?>
<FORM name="myform" method="GET" action="page.php">
<SELECT name="product" onChange="document.forms.myform.submit()">
<?
while ($i < $num+1) { 
$name=mysql_result($result,$i-1,"name"); 
echo "<OPTION name=product choice value="$i">$name</OPTION>"; 
$i++; 
} 

echo <<< EOHTML
</SELECT>
<INPUT type=hidden name=page value=info>
<INPUT type=submit name=submit_button value=Visa>
<INPUT type=hidden name=cat value=$cat>
</FORM>
EOHTML;

if (session_is_registered("valid_user")) 
echo "Valkommen $valid_user"; 
?>