/* 

	Easy Scroll v1.0
	written by Alen Grakalic, provided by Css Globe (cssglobe.com)
	please visit http://cssglobe.com/post/1495/easy-scroll-accessible-content-scroller
	
*/

//ARROW KEY DETECTION CODE
//initial slide number
var slideNo=1;
var numSlides;

//the addendum
var addendum = "";
this.keypress = function(evt) {
	var newRL = document.getElementsByTagName("iframe")[0].src;
	newRL = newRL.split("#");
    if (evt) {
        if (evt.keyCode == 37) {
			if(slideNo == 1) {
				slideNo = numSlides+1;
			}
			addendum = "#" + (--slideNo);
			document.getElementsByTagName("iframe")[0].src = newRL[0] + addendum;
		}       
        if (evt.keyCode == 39) {
			if(slideNo == numSlides){
				slideNo = 0;
			}
			addendum = "#" + (++slideNo);
			document.getElementsByTagName("iframe")[0].src = newRL[0] + addendum;
		} 
	}
}
//END ARROW KEY DETECTION CODE

//scroll location
var scrollPos = 0;

this.scroller02 = function(){
	
	// id of the container element 
	var id = "scrollBox2";
	
	// navigation buttons text
	var nav = ["<img src=images/buttons/scroll_2_up.png>", "<img src=images/buttons/scroll_2_down.png>", "<img src=images/buttons/scroll_reset.png>"];
	
	//	id for each navigation button (OPTIONAL)
	var navId = ["btnUp", "btnDown", "btnReset"];

	// movement speed
	var speed = 5;
	
	// desired height of the container element (in pixels)
	var height = 345;
	
	//
	// END CONFIG
	// do not edit below this line (unless you want to of course :) )
	//

	var obj = document.getElementById(id);
	
	obj.up = false;
	obj.down = false;
	obj.fast = false;

	var container2 = document.createElement("div");
	var parent = obj.parentNode;
	container2.id="scroller02";
	parent.insertBefore(container2,obj);
	parent.removeChild(obj);	
	
	container2.style.position = "relative";
	container2.style.height = height + "px";
	container2.style.overflow = "hidden";
	obj.style.position = "absolute";
	
	//DETERMINE INITIAL SCROLL LOCATION
	//1. Get the predetermined sroll location from the url
	var searchString = document.location.search;
	// strip off the leading '?'
	searchString = searchString.substring(1);
	//make sure the scrollPos variable is actually present...
	if(searchString.indexOf("=") != -1){
		var nvPair = searchString.split("=");
		var name = nvPair[0];
		var value = nvPair[1];
	}
	else var value = 0;
	
	obj.style.top = value;
	obj.style.left = "0";
	container2.appendChild(obj);
	scrollPos = value;
	//END DETERMINATION OF SCROLL POS & ASSIGNMENT OF SCROLL VALUE
	
	//OBTAIN THE NUMBER OF SLIDES ON THIS PAGE
	//alert("I'm IE and I suck");
	if(navigator.appName == "Microsoft Internet Explorer"){
		numSlides = 0;
		i = 0;
		a = window.frames[0].document.getElementsByTagName("div");
		while (element = a[i++]) {
		  if (element.className == "IMG_NAV_MID") {
			numSlides++;			
		  }
		}
	}
	else{
		numSlides = 0;
		numSlides = window.frames[0].document.getElementsByClassName("IMG_NAV_MID").length;
	}
	//END DETERMINATION OF NUMBER OF SLIDES
	
	var btns = new Array();
	var ul = document.createElement("ul");
	ul.id="scroller02nav";
	for (var i=0;i<nav.length;i++){
		var li = document.createElement("li");
		li.innerHTML = nav[i];
		li.id = navId[i];
		btns.push(li);
		ul.appendChild(li);
	};
	parent.insertBefore(ul,container2);
	
	btns[0].onmouseover = function(){
		obj.up = true;
		this.className = "over";
	};
	btns[0].onmouseout = function(){
		obj.up = false;
		this.className = "";
	};		
	btns[1].onmouseover = function(){
		obj.down = true;
		this.className = "over";		
	};
	btns[1].onmouseout = function(){
		obj.down = false;
		this.className = "";
	};		
	btns[0].onmousedown = btns[1].onmousedown = function(){
		obj.fast = true;
	};	
	btns[0].onmouseup = btns[1].onmouseup = function(){
		obj.fast = false;
	};		
	btns[2].onmouseover = function(){ 		
		this.className = "over";
	};	
	btns[2].onmouseout = function(){ 		
		this.className = "";
	};		
	btns[2].onclick = function(){ 		
		obj.style.top = "0px";
	};		
		
	this.start = function(){				
		var newTop;
		var objHeight = obj.offsetHeight;
		var top = obj.offsetTop;
		var fast = (obj.fast) ? 2 : 1;
		if(obj.down){		 
			newTop = ((objHeight+top) > height) ? top-(speed*fast) : top;	
			obj.style.top = newTop + "px";
			scrollPos = newTop;
		};	
		if(obj.up){		 
			newTop = (top < 0) ? top+(speed*fast) : top;
			obj.style.top = newTop + "px";
			scrollPos = newTop;
		};
	};	
	obj.interval = setInterval("start()",50);		
		
};


//
// script initiates on page load. 
//

this.addEvent = function(obj,type,fn){
	if(obj.attachEvent){
		obj['e'+type+fn] = fn;
		obj[type+fn] = function(){obj['e'+type+fn](window.event );}
		obj.attachEvent('on'+type, obj[type+fn]);
	} else {
		obj.addEventListener(type,fn,false);
	};
};

addEvent(window,"load",scroller02);

addEvent(document,"keyup",keypress);

function procLoc() {       
    var url = "http://www.yahoo.com";   
	$("#location").attr('href',url);
}  
   
 function redirectMe(aLoc) {  
	var myLoc = aLoc + "?scroll=" + scrollPos;
    document.location.href = myLoc;   
 }