// jQuery Banner Slider
// Author: Gordon Hall
// Written from scriz-atch, bi-atch

$(document).ready(function() {
		
		// get the size of the slideshow container
		var ctrHeight = $('#slideshowCtr').css('height');
		var ctrWidth = $('#slideshowCtr').css('width');
		
		// set the size of the slideNav
		$('#slideNav').css('width', parseInt(ctrWidth) + 32 + 'px');
		
		// get number of images and set width of imgRoll
		var imgTotal = $('div#imgRoll > a').size(); 
		var imgRollWidth = imgTotal * parseInt(ctrWidth);
		$('div#imgRoll').css('width', imgRollWidth);
		
		// set images to the size of the slideshow viewport	
		$('div#imgRoll a, div#imgRoll a img').css('height',ctrHeight);
		$('div#imgRoll a, div#imgRoll a img').css('width', ctrWidth);
		
		// set maximum scroll distance
		var maxScroll = imgRollWidth - parseInt(ctrWidth) + 'px';
		
		// move to next right image
		$('a#next').click(function() {
			// unless on the last image
			if ($('div#imgRoll').css('left') == '-' + maxScroll)
			{
				$('div#imgRoll').animate({left: '0px'}, 'slow');
			} else {
				$('div#imgRoll').animate({
					left: '-=' + parseInt(ctrWidth) + 'px'
				}, 'slow');
			}
		});
		
		// move to next left image
		$('a#prev').click(function() {
			// unless on the last image
			if ($('div#imgRoll').css('left') == '0px')
			{
				$('div#imgRoll').animate({left: '-' + maxScroll}, 'slow');
			} else {
				$('div#imgRoll').animate({
					left: '+=' + parseInt(ctrWidth) + 'px'
				}, 'slow');
			}
		});
		
		
		// auto start slideshow
		function slide(){$('a#next').click();}

		// simulate click every 3 seconds
		var slideDuration = window.setInterval(slide, 5000);

		// on click deactivate auto-scrolling
		$('a#prev, a#next').click(
			function(event){
				if(event.originalEvent){
					window.clearInterval(slideDuration);
				}
			}
		);
			
	});