Go to url with value from input type text

[Dragosh]

echo "

<input type=\"text\" id=\"inputnumber\" value=\"\" />
<input type=\"button\" value=\"Go\" onclick=\"javascript:window.location='". $_SERVER['PHP_SELF'] . "?pagenum=document.getElementById('pagenumberinput').value;\" />";

When i click on Go button nothing happens.
For example in the input field i typed 2. When i press Go i should go to page localhost/facts/pagination2.php?pagenum=2 but it doesnt happen like that. when i press go nothing happens.
I looked at the output source code. it looks like that :

<input id="pagenumberinput" type="text" /><input type="button" value="Go" onclick="javascript:window.location='/facts/pagination2.php?pagenum=document.getElementById('pagenumberinput').value;" />

Any ideas how to correct this?

[daveVk]

The getElementById bit needs to out of the qoutes like

onclick="javascript:window.location='/facts/pagination2.php?pagenum='+document.getElementById('pagenumberinput').value;"

[Dragosh]

daveVk you're a genius!
billion thanks. ha, i didnt even thought of that!
thanks again, that really solved my problem.