/* popupWindow */
function popupWindow(mypage, myname, w, h, scroll) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2 - 50;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
	win = window.open(mypage, myname, winprops)
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

/* hidemail */
String.prototype.showAddr = 
function (_hamper,_prefix,_postfix,_face)
{
  _hamper=
  _prefix+
  "@"+
  this+
  (_postfix || '')
  document.write((_face||_hamper).link("mailto:"+_hamper));
}