function toggle(div_id) {
	var el = document.getElementById(div_id);
	if ( el.style.display == 'none' ) {	el.style.display = 'block';}
	else {el.style.display = 'none';}
}
function popup(windowname) {
	toggle('blanket');
	toggle(windowname);
}
function isIE()
      {
      return /msie/i.test(navigator.userAgent) && !/opera/i.test(navigator.userAgent);
      }