// popup functions ###############################################################################################/
function open_popup (ref, url, width, height, scroll, menu, toolbar, location, status, resizable, titlebar) {
  window.open(url,
              ref,
              "toolbar=no, location=no, menubar=" + ((menu) ? 'yes' : 'no')  + ", " +
              "scrollbars=" + ((scroll) ? 'yes' : 'no')  + ", " +
              "toolbar=" + ((toolbar) ? 'yes' : 'no')  + ", " +
              "status=" + ((status) ? 'yes' : 'no')  + ", " +
              "location=" + ((location) ? 'yes' : 'no')  + ", " +
              "resizable=" + ((resizable) ? 'yes' : 'no')  + ", " +
		      "titlebar=" + ((titlebar) ? 'yes' : 'no') + ", " +
              "width=" + width + ", height=" + height
             );
}

// search field ###############################################################################################/
function searchbox() {
  searchbox = document.getElementById('searchfield');
  if (searchbox.value == 'search') {
    searchbox.value = '';
  }
}