var locationHint = 'Ville, État, Pays, Code postal';

function locationFocus(elem, focus_gained) {
    if (focus_gained) {
        if (elem.value != '' && elem.value == "Ville, État, Pays, Code postal") {
            elem.value = "";
        }
    } else {
        if (elem.value == "") {
            elem.value = "Ville, État, Pays, Code postal";
        }
    }
}