var URL_GET_USER_POSITION = "http://www.gpslook.net/gps_get_coord.php";
var trackArray = new Array();
var trackIdArray = new Array();

function getTrackList(){
	return trackIdArray;
}

function createTrack(trackId,trackData)
{
	if (trackData.length==0){
		alert("找不到轨迹数据！");
		return ;
	}
	
	for(i=0;i<trackIdArray.length;i++){
		if (trackIdArray[i]==trackId)
		{
			map.centerAndZoom(new LTPoint( trackData[i] , trackData[i+1] ),1);
			//map.moveToCenter(points[0]);
			return ;
		}
	}
	trackIdArray.push(trackId);
	var points = new Array();
	for(i=0;i<trackData.length;i+=2){
		points.push( new LTPoint( trackData[i] , trackData[i+1] ) );			
	}

	map.centerAndZoom(points[0],1);
	
	//根据点数组创建一条折线
	var polyLine = new LTPolyLine( points );
	//将折线添加到地图
	map.addOverLay( polyLine );
	trackArray.push(polyLine);
}



function removeTrack(trackId)
{
	
	for(i=0;i<trackIdArray.length;i++)
		if (trackIdArray[i]==trackId)
		{
			map.removeOverLay(trackArray[i],true);
			trackArray.splice(i,1);
			trackIdArray.splice(i,1);
			return ;
		}

}