Jump to content

Recommended Posts

This is a simply drop down box with three selections, one, two and three. while i try to select option two, i need a message box pop up showing two, if i select option three, the message box will show three. However i got the below error while i select it. Any problem with this simple codes ?

[b]Error: 'document.form1.select.value' is null or not an object[/b]
==================================================================

<?
print_r($_POST); print"<br>";
print_r($_GET);print"<br>";
$a = $_GET[select];
print $a;
?>

<select name='select' onchange='go(this)'>
<option value='one'>one</option>
<option value='two'>two</option>
<option value='three'>three</option>
</select>
<form name='form1'>
<input type='hidden' name='txtSelect' value='select'>
</form>

<script type="text/javascript">
function go(opt)
{
var name = document.form1.select.value;
alert (name);
}
</script>
Link to comment
https://forums.phpfreaks.com/topic/3529-drop-down-list-problem/
Share on other sites

Change your onchange to this:

onchange="javascript: go(this, this.selectedIndex);"

Change your JS function to this:

<script type="text/javascript">
function go(x, y) {
alert (x[y].value);
}
</script>

Please post your questions in the proper forum in the future...this should be in the Javascript forum.
Link to comment
https://forums.phpfreaks.com/topic/3529-drop-down-list-problem/#findComment-12204
Share on other sites

This thread is more than a year old. Please don't revive it unless you have something important to add.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.