/**
 * 	Slider initialisation
 * 	
 * 	Author: Guy Leaver
 * 	Modified: 01/02/09
 */

	var pos = 0;
	var end = 0;
	var v_pos = 0;
	var v_end = 0;
	
	$(document).ready(function(){
		$("#s_scroll_left").click(function(){
			if (pos > 0) {
				$("#s_scroll_right").css("display","block");
				var alt = 5; 
				if ( pos < 5 ) { alt = pos; }
				pos -= alt;
				$("#slidertray").animate({left: "+=" + (148*alt) + "px"},1000);
				$("#min").innerHTML = pos + 1;
				$("#max").innerHTML = pos + 5;
				if (pos == 0) { $("#s_scroll_left").css("display","none"); }
			}
		});
		$("#s_scroll_right").click(function(){
			if (pos < end) {
				$("#s_scroll_left").css("display","block");
				var alt = 5; 
				if ( (end - pos) <= 5 ) { alt = end - pos; }
				pos += alt;
				$("#slidertray").animate({left: "-=" + (148*alt) + "px"},1000);
				$("#min").innerHTML = pos + 1;
				$("#max").innerHTML = pos + 5;
				if (pos == end) { $("#s_scroll_right").css("display","none"); }
			}
		});
		$("#s_scroll_down").click(function(){
			if (v_pos < v_end) {
				$("#s_scroll_up").css("display","block");
				v_pos++;
				$("#v_slidertray").animate({top: "-=100px"},"slow");
				if (v_pos == v_end) { $("#s_scroll_down").css("display","none"); }
			}
		});
		$("#s_scroll_up").click(function(){
			if (v_pos > 0) {
				$("#s_scroll_down").css("display","block");
				v_pos--;
				$("#v_slidertray").animate({top: "+=100px"},"slow");
				if (v_pos == 0) { $("#s_scroll_up").css("display","none"); }
			}
		});
	});
	
	function glowSlide(item) { $("#s_scroll_" + item).attr("src","images/common/scroll_" + item + "_on.png"); }
	function noSlide(item) { $("#s_scroll_" + item).attr("src","images/common/scroll_" + item + "_off.png"); }
	function goTo(div) {
		var pix = div * 720;
		var target = "-" + pix + "px";
		$("#b_slidertray").animate({left: target},400);
	}