/* 

	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
	
*/

this.thumbscroll = function(){
	
	// id of the container element 
	var id = "tmbContainer";
	
	// navigation buttons text
	var nav = ['<img src="gallery/scroll/up.png" />', '<img src="gallery/scroll/dn.png" />', 'web', "illustrate", "paint", "sketch"];
	
	//	id for each navigation button (OPTIONAL)
	var navId = ["btnUp", "btnDown", "btnReset", "anchor01", "anchor02", "anchor03"];

	// movement speed
	var speed = 5;
	
	// desired height of the container element (in pixels)
	var height = 368;
	
	// lets see is we can make an anchor in all this
	//var anchors = ;
	
	
	//
	// 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;
	
	//anchor_01
	
	
	//var anch_01 = document.getElementById("anchor_01");
	//findPosition(anch_01);
	/*
	var anch_y;
	if( typeof( document.getElementById("anchor_01").offsetParent ) != 'undefined' ) {
		anch_y = document.getElementById("anchor_01").offsetTop;
	} else {
		anch_y = document.getElementById("anchor_01").y;
	}
*/
	
//	asd fa oiwehiafs h aio 
	
	var container = document.createElement("div");
	var parent = obj.parentNode;
	container.id="thumbscroll";
	parent.insertBefore(container,obj);
	parent.removeChild(obj);	
	
	container.style.position = "relative";
	container.style.height = height + "px";
	container.style.overflow = "hidden";
	
	obj.style.position = "absolute";
	obj.style.top = "0";
	obj.style.left = "0";
	container.appendChild(obj);
	
	var btns = new Array();
	var ul = document.createElement("ul");
	ul.id="thumbscrollnav";
	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,container);
	
	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";
	};
	btns[3].onmouseover = function(){ 		
		this.className = "over";
	};	
	btns[3].onmouseout = function(){ 		
		this.className = "";
	};		
	btns[3].onclick = function(){ 		
//		obj.style.top = "-435px";		
		obj.style.top = "-433px";
	};	
	btns[4].onmouseover = function(){ 		
		this.className = "over";
	};	
	btns[4].onmouseout = function(){ 		
		this.className = "";
	};		
	btns[4].onclick = function(){ 		
//		obj.style.top = "-625px";		
		obj.style.top = "-623px";
	};	
	btns[5].onmouseover = function(){ 		
		this.className = "over";
	};	
	btns[5].onmouseout = function(){ 		
		this.className = "";
	};		
	btns[5].onclick = function(){ 		
//		obj.style.top = "-817px";		
		obj.style.top = "-810px";
	};		
		
	this.start = function(){				
		var newTop;
		var objHeight = obj.offsetHeight;
		var top = obj.offsetTop;
		//var fast = (obj.fast) ? 2 : 1; // put back if we want this to be scroll on hover
		var fast = (obj.fast) ? 1 : 0;
		if(obj.down){		 
			newTop = ((objHeight+top) > height) ? top-(speed*fast) : top;	
			obj.style.top = newTop + "px";
		};	
		if(obj.up){		 
			newTop = (top < 0) ? top+(speed*fast) : top;
			obj.style.top = newTop + "px";
		};
	};	
	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",thumbscroll);




//var anch_01 = document.getElementById("anchor_01");
/*
function findPosition( anchors ) {
	  if( typeof( anchors.offsetParent ) != 'undefined' ) {
		for( var posX = 0, posY = 0; anchors; anchors = anchors.offsetParent ) {
		  posX += anchors.offsetLeft;
		  posY += anchors.offsetTop;
		}
		return [ posX, posY ];
	  } else {
		return [ anchors.x, anchors.y ];
	  }
	}
*/