Button click event in Google Maps

[User 9875787]

I am working with Google Maps embedded on my webpage. What I want is to create a button click event, so that after a user has entered an address into a textbox (called txtBoxMaps), they can click a button which will display the new location on the same webpage. I tried using: google.maps.event.addListener(map, 'click', function(event) but when I click the button (btnDisplay) nothing happens. I can see the google map but it doesnt change after the "Display" button is clicked. Here is my code below:

    .style1
    {
        width: 104px;
    }
    .style2
    {
        width: 144px;
    }
    #GO
    {
        width: 92px;
    }
    #Display
    {
        width: 113px;
    }

<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false&libraries=places"></script>
<script type="text/javascript">

function Initialize() {


    var mapOptions = {
        center: new google.maps.LatLng(-33.01, 27.9),
        zoom: 13,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    var map = new            google.maps.Map(document.getElementById('GMap1'), mapOptions);


    google.maps.event.addListener(map, 'click', function(event) {
    mapZoom = map.getZoom();
    startLocation = event.latLng;
    var input = document.getElementById('TextBox1');

    });

}

google.maps.event.addDomListener(window, 'load', Initialize);

</script>

<input type="text" id="TextBox1"/>
<input type = "button" id="btnDisplay" value = "Display"/>

[jkirkerx]

You have to divide the functions in 2 or 3 parts Initilize, drawMap And then call drawMap on the button click

function intialize() {
drawMap();
}
function drawMap() {
var mapOptions = {
center: new google.maps.LatLng(-33.01, 27.9),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
};

var map = new google.maps.Map(document.getElementById('GMap1'), mapOptions);
google.maps.event.addListener(map, 'click', function(event) {
  mapZoom = map.getZoom();
  startLocation = event.latLng;
  var input = document.getElementById('TextBox1');
});

}