[devote]

<div class="map-locations" data-map="18.2065,-67.1566">
4 Store
</div><br />
<div class="map-locations" data-map="42.175642,-72.576486">
5 Store
</div><br />
<div class="map-locations" data-map="Champ de Mars 75007 Paris, France">6 6Store
</div>

<script src="http://code.jquery.com/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
var latlng = [];
$("body").find("div.map-locations").each(function(){
    latlng.push( $( this ).attr("data-map") );
});

alert( latlng.join( "\n" ) );
</script>