Notifier = function(){
	var span = document.createElement("SPAN");
	var div = document.createElement("DIV");
	div.id = "notifier_box";
	span.appendChild(div);
	document.body.appendChild(span);
	this.msgBox = div;
}

Notifier.prototype.scrollHandler = function () {
	this.msgBox.style.top = this.getScrollTop();
}

Notifier.prototype.display = function ( str ) { 
	this.msgBox.style.display = 'block'; 
	this.msgBox.style.visibility = 'visible';
	this.msgBox.style.top = getWindowScrollTop();
	if ( this.msgBox.currentStyle && this.msgBox.currentStyle.position == 'absolute' ) {
		window.notifier = this;
		window.onscroll = function() {
			this.notifier.msgBox.style.top = getWindowScrollTop();
		};
	};
	this.msgBox.innerHTML = str;
}

Notifier.prototype.hide = function () {
	this.msgBox.style.display = 'none';
	this.msgBox.style.visibility = 'hidden';
	window.onscroll = null;
}

function getWindowScrollTop() {
	if ( document.documentElement.scrollTop )
		return document.documentElement.scrollTop;
	return document.body.scrollTop;
}