Can anyone help with this error?

[dorsetinternet]

I am using the Aqua template and I have a problem when you first visit the site, the error is:
Notice: Undefined index: Itemid in D:\home\Default\website\htdocs\joomla\templates\si teground74\menu.php on line 8

The error disappears if you click the home button or any other button.

line 8 of the code looks like this:

$item_id = mysql_escape_string( $_GET['Itemid'] );

It would be great if someone can help me fix this error.
Thanx

[sava]

Hello,

The error mesage and more specifically, the path specified in it points me to a setting issue . I suppose you are using a local WAMP server (due to the directory structure), which causes this. If this is not the case, please PM me your domain name and Joomla admin login details, so I can have a closer look.