passing database values to javascript function

hi to all,
 i have javascript file named as sample.js,

in my js file i have some methods like
 function loadEarth(mapdiv) {
    if (GBrowserIsCompatible()) {
    if(!mapdiv)return true;
      var map=new GMap2(document.getElementById("map"));
      map.setCenter(new google.maps.LatLng(12.925348,74.828138),14);
      map.addControl(new GOverviewMapControl());
      map.enableDoubleClickZoom();
      map.enableScrollWheelZoom();
      map.addControl(new GMapTypeControl());
      map.addControl(new GSmallMapControl());
      map.setMapType(G_SATELLITE_MAP);
      }
in above method i have taken lat long values statically,but i need take ...