calling javascript function

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Folks,

I have this js function within the head tag of the template that I'm using:

{literal}

function libdal() {
window.open('url/Dallas/satsang/index.php','mywindow','width=700,height=600,toolbar=yes,
location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,copyhistory=yes,
resizable=yes')
}

{/literal}

and calling it from one of the pages with:



   


However, clicking on the resulting button does nothing. Is there anything wrong with the function or with the way it is called?
I'm , no guru in this area.

TIA