Poll code

I have this javascript code for a poll. On the click of a button a window opens. Is there a way that I can make the window 400 X 200 px. Thanks

<script language=”JavaScript”>
<!–

function SymError()
{
return true;
}

window.onerror = SymError;

var SymRealWinOpen = window.open;

function SymWinOpen(url, name, attributes)
{
return (new Object());
}

window.open = SymWinOpen;

//–>
</script>

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