function install (aEvent)
{
    var elem = aEvent.target;
    while (elem.tagName != "A")
 	elem = elem.parentNode;
 
    var params = {
	"Masterpass": { URL: elem.href,
			IconURL: elem.getAttribute("iconURL"),
			Hash: elem.getAttribute("hash"),
			toString: function () { return this.URL; }
	}
    };
    InstallTrigger.install(params);

    return false;
}