function SwatButton(id, show_processing_throbber)
{
	this.id = id;

	this.button = document.getElementById(this.id);

	// deprecated
	this.show_processing_throbber = show_processing_throbber;

	this.confirmation_message = '';
	this.throbber_container = null;

	if (show_processing_throbber) {
		this.initThrobber();
	}

	YAHOO.util.Event.addListener(this.button, 'click',
		this.handleClick, this, true);
}

SwatButton.prototype.handleClick = function(e)
{
	var confirmed = (this.confirmation_message) ?
		confirm(this.confirmation_message) : true;

	if (confirmed) {
		if (this.throbber_container !== null) {
			this.button.disabled = true;

			// add button to form data manually since we disabled it above
			var div = document.createElement('div');
			var hidden_field = document.createElement('input');
			hidden_field.type = 'hidden';
			hidden_field.name = this.id;
			hidden_field.value = this.button.value;
			div.appendChild(hidden_field);
			this.button.form.appendChild(div);

			this.button.form.submit(); // needed for IE
			this.showThrobber();
		}
	} else {
		YAHOO.util.Event.preventDefault(e);
	}
};

SwatButton.prototype.initThrobber = function()
{
	this.throbber_container = document.createElement('span');

	YAHOO.util.Dom.addClass(this.throbber_container,
		'swat-button-processing-throbber');

	this.button.parentNode.appendChild(this.throbber_container);
};

SwatButton.prototype.showThrobber = function()
{
	var animation = new YAHOO.util.Anim(this.throbber_container,
		{ opacity: { to: 0.5 }}, 1, YAHOO.util.Easing.easingNone);

	animation.animate();
};

SwatButton.prototype.setProcessingMessage = function(message)
{
	if (this.throbber_container === null) {
		this.initThrobber();
	}

	if (message.length > 0) {
		this.throbber_container.appendChild(document.createTextNode(message));
		YAHOO.util.Dom.addClass(this.throbber_container,
			'swat-button-processing-throbber-text');
	}
};

SwatButton.prototype.setConfirmationMessage = function(message)
{
	this.confirmation_message = message;
};