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<script type="text/javascript">

var pos = null;

if(navigator.geolocation)navigator.geolocation.getCurrentPosition(function(position){registerPosition(position)});
var registerPosition = function(position) {
        pos = {"lat":position.coords.latitude, "long":position.coords.longitude};
}

var check = function(){
        if(pos){
                $("body").append(pos.lat+" - "+pos.long);
                clearTimeout ( timer );
        } else $("body").append("checking ...<br />");
}
var timer = setInterval( check, 200);

</script>