creating an object and calling function in event handler

Hi

I have trouble in executing the following part of code. can anyone help on it

<input type="button" value="Go" onclick="
var pager = new Pager('results',10);
pager.init();
pager.showPageNav('pager', 'pageNavPosition');
pager.showPage(1);return false;
" />

whenever i execute this code, i get an error that pager is undefined.But if i put this line "var pager = new Pager('results',10);" in a separate script then it works fine.. so please help me in this issue.

<script type="text/javascript">
function show()
{
var pager = new Pager('results',10);
pager.init();
pager.showPageNav('pager', 'pageNavPosition');
pager.showPage(1);return false;
}
</script>

<input type="button" value="Go" onclick="show();" /> ?

Even this i tried.. same error occurs....

should pager variable be a global? In this case:

... onclick="pager=new Pager('results',10);..."

If it is a global variable .then the logic doesnt work properly