[imp] onclick - JavaScript at menu.php

[mfred]

Hi,

I want to define a new Button in Imp

this is what I have done (but not working as wanted):

$_menu[] = array(
'url' => '',
'text' => 'test',
'icon' => 'important.gif',
'icon_path' => '/horde/imp/graphics/',
'target' => '_blank',
'onclick' =>
'window.open('targeturl','_blank','width=550,height=430,left=300,top=100')'
);

As the html code works
<a href=""
onClick="window.open('targeturl','_blank','width=550,height=430,left=300,top
=100')">test</a>

I can't see why I get a parse error in Imp.

Aim is to not only open a new page but to have it as popup without
address-field and with given size.

Please help me
rgds,
mfred