// pop window
function pop(url,w,h,t,l)
{
//   var w_dft = 350; // default width
//   var h_dft = 270; // default height
   var t_dft = 0;   // default top
   var l_dft = 0;   // default left
   var params = "resizable,scrollbars,toolbar";
   if (w) { 
      params += ",width=" + w; }
   if (h) { 
      params += ",height=" + h; }
   params += ",top=" + (t?t:t_dft) + ",left=" + (l?l:l_dft);
   var win = window.open(url,"popWin",params);
   win.focus();
}

// scroll lyrics across the page
var ivId = 0;
var pos = 700;
function ctx_scroll_lyric(lyric_id) 
{
   var lyric = document.getElementById(lyric_id);      
   lyric.style.left = --pos;
}
function toggle() {
   if (ivId) {
      clearInterval(ivId);
      ivId = 0;
   } else {
      ivId = setInterval("ctx_scroll_lyric('lyrics')", 10);
   }
}