Convert string to Date 2

Convert '2013.04.12 14:40' string to Date format

HTML

<div class="date-convertor">
    <h4>Convert string "2013.04.12 14:40" to JS Date format</h4>
    <div>
        <span>Input date string</span><input type="text" id="dateString"/>
    </div>
    <div>
        <span>Result</span><input type="text" id="jsDateString"  disabled="true" />
    </div>
    <input type="button" value="Convert" id="convert" />
</div>

CSS

.date-convertor > div > span {
    display: inline-block;
    width: 110px;
}
.date-convertor > div > input {
    width: 250px;
}

JavaScript

document.getElementById('convert').onclick = function() {
    var dateString = document.getElementById('dateString').value;
    var arr = dateString.split('/');
    var month = parseInt(arr[1])-1;
    var date = new Date(arr[0], parseInt(arr[1])-1, arr[2]);
    alert(arr);
    
    document.getElementById('jsDateString').value = date;
}