var map = L.map(\'map\');
var marker = L.marker([10.496093,-66.881935]).on(\'click\', onClick);
function onClick(e) {alert(e.latlng);}
marker.addTo(map)
Here's a jsfiddle with a function call:
https://jsfiddle.net/8282emwn/
var marker = new L.Marker([46.947, 7.4448]).on('click', markerOnClick).addTo(map);
function markerOnClick(e)
{
alert("hi. you clicked the marker at " + e.latlng);
}