// function for changing stylesheets using
// document.getElementsByTagName("link")
function setLinkedStyleSheet(title) {
var linkNodes = document.getElementsByTagName("link");
for ( i = 0; i < linkNodes.length; i++ ) {
  linkNode = linkNodes[i];
  relAttr = linkNode.getAttribute('rel');
  if ( relAttr && ( relAttr.indexOf("style") != -1 ) && linkNode.getAttribute("title") ) {
	linkNode.disabled = true;
	if ( linkNode.getAttribute("title") == title )
	  linkNode.disabled = false;
  }
}
}

// function for changing stylesheets using document.styleSheets
function setStyleSheet(theme) {
for ( i = 0; i < document.styleSheets.length; i++ ) {
  if ( document.styleSheets[i].title ) {
	document.styleSheets[i].disabled = true;
	if ( document.styleSheets[i].title == theme )
	  document.styleSheets[i].disabled = false;
  }
}
}