/*****************************************************************************
 * jQuery Headline Scroll
 * Version: 1.0 released 2007-12-08
 * Author: Dave Ross <dave@csixty4.com>
 * License: BSD
 * Requires: jQuery 1.2.1 or higher (may work with others, not tested)
 *
 * To make an element scroll automatically, assign it a height through CSS
 * and give it the class "autoscroll".
 *
 * To control scroll speed, give new values to these global variables:
 *   scrollerIntervalMs = {how often to scroll, in milliseconds, default 200}
 *   scrollerStep       = {# of pixels to scroll each interval, default 1}
 *
 * Copyright (c) 2007, Dave Ross <dave@csixty4.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the <organization> nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Dave Ross ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ****************************************************************************/

var scrollerStep = 1;
var scrollerIntervalMs = 45;

function initScroller()
{
	$('.autoscroll').each( function() {

		$(this).mouseover(function() { doPause(this); });

		$(this).mouseout(function() { doPause(this); });

		$(this).css('overflow', 'hidden');

	});

	setInterval("doScroll()", scrollerIntervalMs);	
}

function doScroll()
{
	$('.autoscroll').filter(':not(".paused")').each( function() {

		var x = this.scrollTop;

		// The height of the div, as defined by CSS
		var divHeight = parseInt($(this).css('height'));

		// The height of the div's contents
		var contentHeight = this.scrollHeight;

		// Increment the position we're scrolling to by 1px
		x += scrollerStep;

		// Start over if we've scrolled too far
		if(x > (contentHeight - divHeight)) x = 0;

		// Scroll!
		this.scrollTop = x;

	});
}

function doPause(el)
{
	$(el).toggleClass('paused');
}

$(document).ready(function() {
   initScroller();
});