var g_previewwin=null;
var preview_type=null;
function glob_preview(url,artist,track)
{
    var surl = url;
    var track = track;
    var artist = artist;
    if(url.substr(0,4) == 'http'){
      var w_width = 550;
      var w_height = 150;
      preview_type = 'url';
    } else {
      var w_width = 400;
      var w_height = 300;
      preview_type='amazon';
    }
    var c_window = YGWin.getCenteredWindowCoords(w_width,w_height);
    var w_left  = c_window.left;
    var w_top  = c_window.top;
    var w_url = page_to_src('php_samples.php?url=')+escape(surl)+'&track='+escape(track)+'&artist='+escape(artist)+'&preview_type='+preview_type;
    var opts = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,height='+w_height+',width='+w_width+',left='+w_left+',top='+w_top;

    if (g_previewwin) g_previewwin.close();
    g_previewwin = window.open( w_url, 'preview',  opts);
}

function edit_comment(id){
  document.getElementById('display_comment_'+id).style.visibility = 'hidden';
  document.getElementById('display_comment_'+id).style.height = '0px';
  document.getElementById('edit_comment_'+id).style.visibility = 'visible';
  
}