public static boolean isInHeader(final String scriptname) {
    final NodeList linkList =
        Browser.getDocument().getHead().getElementsByTagName(CssResources.TAG_TYPE);
    for (int i = 0; i < linkList.getLength(); i++) {
      final LinkElement linkTag = (LinkElement) linkList.item(i);
      if (StringUtils.equals(linkTag.getType(), CssResources.SCRIPT_TYPE)
          && StringUtils.equals(linkTag.getRel(), CssResources.REL_TYPE)
          && StringUtils.contains(linkTag.getHref(), scriptname)) {
        return true;
      }
    }
    return false;
  }
public static boolean isInHeader ( final String scriptname ) { final NodeList linkList = Browser . getDocument ( ) . getHead ( ) . getElementsByTagName ( CssResources . TAG_TYPE ) ; for ( int i = 0 ; i < linkList . getLength ( ) ; i ++ ) { final LinkElement linkTag = ( LinkElement ) linkList . item ( i ) ; if ( StringUtils . equals ( linkTag . getType ( ) , CssResources . SCRIPT_TYPE ) && StringUtils . equals ( linkTag . getRel ( ) , CssResources . REL_TYPE ) && StringUtils . contains ( linkTag . getHref ( ) , scriptname ) ) { return true ; } } return false ; }
check if script is already in the header.

@return true if it exists