I'm developing a webpage and I would just like to make something more user friendly. I have a functional Google Maps api v3 and an address search bar. Currently, I have to use the mouse to select search to initialize the geocoding function. How can I make the map return a placemark by hitting the enter button on my keyboard? I just want to make it as user-friendly as possible.

Here is the javascript and div, respectively, I created for the address bar:

var geocoder;
    function initialize() {
    geocoder = new google.maps.Geocoder (); 
    function codeAddress () {
        var address = document.getElementById ("address").value;
        geocoder.geocode ( { 'address': address}, function(results, status)  {
        if (status == google.maps.GeocoderStatus.OK)  {
            map.setCenter(results [0].geometry.location);
            marker.setPosition(results [0].geometry.location);
            map.setZoom(14);
            } 
        else {
            alert("Geocode was not successful for the following reason: " + status);
                }
        }); 
                            }


<div id="geocoder">
        <input id="address" type="textbox" value="">
        <input type="button" value="Search" onclick="codeAddress()">
    </div>

Thank you in advance for your help