Javascript button OnClick Event


I have a for loop that adds a button to a google maps infowindow. What I'm trying to do it use the iterator as the ID of the button so the OnClick event loads a certain url from an array of urls.

The page is never loaded though as the neighborhoodGraphics object is always undefined. Is there a better way to do this?

function addMarker() {
        var contentString = '<div id="content">'+
            '<div id="siteNotice">'+
            '<h1 id="firstHeading" class="firstHeading">'+neighborhoodNames[iterator]+'</h1>'+
            '<div id="bodyContent">'+
            '<button class="btn btn-primary btn-large" id='+iterator+' onclick="loadGraphic(this.ID)">To Graphic &raquo;</button>'+

        var infowindow = new google.maps.InfoWindow({
            content: contentString
        var marker = new google.maps.Marker({
            position: neighborhoods[iterator],
            map: map,
            draggable: false,
            animation: google.maps.Animation.DROP,
            ID: iterator
        google.maps.event.addListener(marker, 'mouseover', function() {
function loadGraphic(i)
    window.location.href = neighborhoodGraphics[i];


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On line 8 you are trying to access "this.ID" instead of "".
'<button class="btn btn-primary btn-large" id='+iterator+' onclick="loadGraphic(this.ID)">'+

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And you could simplify by using iterator directly instead of putting it into the id attribute and pulling it out later:
'<button class="btn btn-primary btn-large" onclick="loadGraphic('+iterator+')">'+

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