var ImgN = 6;
var ImgHeight = 350;


function $(id) { return document.getElementById(id); }

function addLoadEvent(func){
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function(){
			oldonload();
			func();
		}
	}
}

function moveElement(elementID,final_x,final_y,interval) {
  if (!document.getElementById) return false;
  if (!document.getElementById(elementID)) return false;
  var elem = document.getElementById(elementID);
  if (elem.movement) {
    clearTimeout(elem.movement);
  }
  if (!elem.style.left) {
    elem.style.left = "0px";
  }
  if (!elem.style.top) {
    elem.style.top = "0px";
  }
  var xpos = parseInt(elem.style.left);
  var ypos = parseInt(elem.style.top);
  if (xpos == final_x && ypos == final_y) {
		return true;
  }
  if (xpos < final_x) {
    var dist = Math.ceil((final_x - xpos)/10);
    xpos = xpos + dist;
  }
  if (xpos > final_x) {
    var dist = Math.ceil((xpos - final_x)/10);
    xpos = xpos - dist;
  }
  if (ypos < final_y) {
    var dist = Math.ceil((final_y - ypos)/10);
    ypos = ypos + dist;
  }
  if (ypos > final_y) {
    var dist = Math.ceil((ypos - final_y)/10);
    ypos = ypos - dist;
  }
  elem.style.left = xpos + "px";
  elem.style.top = ypos + "px";
  var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";
  elem.movement = setTimeout(repeat,interval);
}

function classNormal(iFocusBtnID){
	var iFocusBtns= $(iFocusBtnID).getElementsByTagName('li');
	for(var i=0; i<iFocusBtns.length; i++) {
		iFocusBtns[i].className='normal';
	}
}

function classCurrent(iFocusBtnID,n){
	var iFocusBtns= $(iFocusBtnID).getElementsByTagName('li');
	iFocusBtns[n].className='current';
}


function iFocusChange() {
	if(!$('Banners')) return false;
	$('Banners').onmouseover = function(){atuokey = true};
	$('Banners').onmouseout = function(){atuokey = false};
	var iFocusBtns = $('Banners_btn').getElementsByTagName('li');
	var listLength = iFocusBtns.length;
	iFocusBtns[0].onmouseover = function() {
		moveElement('Banners_piclist',0,0,ImgN);
		classNormal('Banners_btn');
		classCurrent('Banners_btn',0);
	}
	
	for(var m = 1; m <=ImgN; m++){
		if (listLength>=m+1) {
			iFocusB(iFocusBtns,m);
		}
	}
	
}


function iFocusB(iFocusBtns,n){
	iFocusBtns[n].onmouseover = function() {
		moveElement('Banners_piclist',0,-ImgHeight*n,ImgN);
		classNormal('Banners_btn');
		classCurrent('Banners_btn',n);
	}
}


setInterval('autoiFocus()',3500);
var atuokey = false;
function autoiFocus() {
	if(!$('Banners')) return false;
	if(atuokey) return false;
	var focusBtnList = $('Banners_btn').getElementsByTagName('li');
	var listLength = focusBtnList.length;
	for(var i=0; i<listLength; i++) {
		if (focusBtnList[i].className == 'current') var currentNum = i;
	}
	
	for(var l = 1; l<ImgN; l++){
		if (currentNum==l-1&&listLength!=1 ){
			moveElement('Banners_piclist',0,-ImgHeight*l,ImgN);
			classNormal('Banners_btn');
			classCurrent('Banners_btn',l);
		}
	}
	
	
	for(var a = 1; a< ImgN; a++){
		if (currentNum==ImgN-1 ){
			moveElement('Banners_piclist',0,0,ImgN);
			classNormal('Banners_btn');
			classCurrent('Banners_btn',0);
		}
		
		if (currentNum==a&&listLength==a+1 ){
			moveElement('Banners_piclist',0,0,ImgN);
			classNormal('Banners_btn');
			classCurrent('Banners_btn',0);
		}
	}
	
}
addLoadEvent(iFocusChange);