function playVideo(uri){
    document.getElementById('vidoverlay').className = 'vidoverlay';
    document.getElementById('vidoverlay').innerHTML = '<div class="vidclose" style="cursor:pointer;" onclick="closeVideo()">close video&nbsp;<img align="absmiddle" src="/tools/vidplayer/close.png" border="0"/></div><div class="vidframesurround"><iframe class="ytframe" title="YouTube" width="640" height="390" src="http://www.youtube.com/embed/'+uri+'?autoplay=1" autoplay="yes" frameborder="0" allowfullscreen></iframe></div>';
}
function closeVideo(){
    document.getElementById('vidoverlay').innerHTML = '';
    document.getElementById('vidoverlay').className = 'hidden';
}