How can i pass latitude and longtitude variables to create google map preview

How can i pass latitude and longtitude variables to create google map preview

I have created the following script and i need to pass the lat and long
variables to the url in order to create a google map preview. I need to
make the preview on window.open with a hybrid map, marker and define zoom.
<script type="text/javascript">
function geoPreview(lat,long) {
var elemA = document.getElementById("lat").value;
var elemB = document.getElementById("long").value;
window.open('http://maps.google.com/maps?q='+elemA+', '+elemB+');
}
</script>
Any help would be appreciated. Thanks.