Google maps API

Hi, I am unable to set the intitial zoom to larger zoom level. It always sets to default zoom level. Can somebody please help.
I tried the following options:
 
 var myOptions = {zoom: 18,mapTypeId: google.maps.MapTypeId.ROADMAP}; var map = new google.maps.Map(document.getElementById("Prov_MAP"), myOptions);
(or)
 map = new GMap2(document.getElementById("Prov_MAP")); map.setCenter(new GLatLng(37.107765,-119.377441),18);
...