function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		links_Login_over = newImage("/images/links_Login-over.gif");
		links_Logout_over = newImage("/images/links_Logout-over.gif");
		links_Register_over = newImage("/images/links_Register-over.gif");
		links_myFlashCards_over = newImage("/images/links_myFlashCards-over.gif");
		links_FlashCardDB_over = newImage("/images/links_FlashCardDB-over.gif");
		links_Help_over = newImage("/images/links_Help-over.gif");
		preloadFlag = true;
	}
}
function writeEmail(host,username,text,extra) {
  document.write("<a href=\"mailto:"+username+"@"+host+"\" "+extra+">");
  if (text) {
    document.write(text);
  } else {
    document.write(username+"@"+host);
  }
  document.write("</a>");
}