javascript - Google Maps API v3: Add Polylines inside a loop? -

i'm in process of migrating our map application v2 v3 (3.2). had loop read latlng , put them in array display polyline on map. set length of array 0 , fill again in loop other latlng display polyline... , on (many times).

it working fine in v2, not in v3. since code complex, tried write simpliest code possible demonstrate issue:

function setpolyline(points) {       var polyline = new google.maps.polyline({           path: points,           strokecolor: '#ff0000',           strokeopacity: 0.5,           strokeweight: 2       });       polyline.setmap(map);    }    var mapdiv = document.getelementbyid('map');   var mapcenter = new google.maps.latlng(0,0);   var mapoptions = {       zoom: 2,       center: mapcenter,       backgroundcolor: '#e1e1e1',       maptypeid: google.maps.maptypeid.roadmap   }   map = new google.maps.map(mapdiv, mapoptions);    var points=[];   points[0]=new google.maps.latlng(-35, 71);   points[1]=new google.maps.latlng(-36, 75);   points[2]=new google.maps.latlng(-37, 91);   setpolyline(points);    points.length=0;   points[0]=new google.maps.latlng(-31, 71);   points[1]=new google.maps.latlng(-32, 75);   setpolyline(points);   

what happens second polyline shown (and not first one). make works, have either use different variable name (points1, points2, points3, ...) can't use because code in loop or re-declare variable each time in loop instead of before (var points=[] before each polyline , remove points.length=0 line).

maybe i'm missing javascript, declare variable outside loop (before) once , use inside loop.

what doing wrong? can help?

here's simple map did demonstrate issue:
http://www.canamgroup.ws/gm.nsf/map?openpage
(it's not in loop, issue same. last polyline displayed if don't use different variable name array or if don't re-declare each time)

thanks!

in case might somebody, see other discussion: http://code.google.com/apis/maps/documentation/javascript/forum.html?place=topic%2fgoogle-maps-js-api-v3%2flp9tyywkph4%2fdiscussion