Javascript syntax for concatenating strings + variables inside of function
<p>In line 5 below I'm attempting to concatenate a variable inside of two strings such that the resulting HTML string inside of my javascript looks like this <code>&lt;iframe src="ImageUpload.aspx?ID=Foo" width="100%" height="100%" frameborder="0"&gt;&lt;/iframe&gt;</code></p>

<p>Here's my javascript as I've written it.  What is the correct syntax for line #5? Everything else is correct.</p>

<pre><code>if (buttontext == "Add Photo Log") {
    var mastertable = $find("&lt;%=RadGrid1.ClientID %&gt;").get_masterTableView();
    var PackageID = mastertable.get_dataItems()[0].getDataKeyValue("PackageID");

    $.fancybox(
        '&lt;iframe src="ImageUpload.aspx?ID=' +PackageID '" width="100%" height="100%" frameborder="0"&gt;&lt;/iframe&gt;',
        {
            'autoDimensions': false,
            'width': 700,
            'height': 'auto',
            'transitionIn': 'none',
            'transitionOut': 'none'
    });
}
</code></pre>
