function getElementsByClass(needle, TagName) {
  var  my_array = document.getElementsByTagName(TagName);
  var  retvalue = new Array();
  var  i;
  var  j;

  for (i = 0, j = 0; i < my_array.length; i++)
  {
    var c = " " + my_array[i].className + " ";
    if (c.indexOf(" " + needle + " ") != -1)
      retvalue[j++] = my_array[i];
  }
  return retvalue;
}

function hideDescription() {
  var divs = getElementsByClass("description", "div");
  var numdivs = divs.length;

  for (i = 0; i < numdivs; i++) {
    divs[i].style.display = "none";
  }
  
  var links = getElementsByClass("title", "div");
  var numlinks = links.length;

  for (i = 0; i < numlinks; i++) {
    links[i].style.color = "#000";
  }
}

function showDescription(num) {
  this.hideDescription();
  document.getElementById('song' + num).style.display = "block";
  document.getElementById('title' + num).style.color = "#6f3838";
}

function openDW(url, width, height) {
	var winDW;
	var winName;
	var specs;
	winName  = "daughter";
	specs = "toolbar=no,";
	specs += "location=no,";
	specs += "directories=no,";
	specs += "status=no,";
	specs += "menubar=no,";
	specs += "scrollbars=yes,";
	specs += "resizable=yes,";
	specs += "top=50,";
	specs += "left=50,";
	specs += "width="+width+",";
	specs += "height="+height;
	winDW = window.open(url, winName, specs);
}