// xAnimation.opacity r2, Copyright 2006-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL

xAnimation.prototype.opacity = function(e,o,t,a,b,oe)
{
  var i = this;
  i.x1 = xOpacity(e); i.x2 = o; // start and target opacity
  i.init(e,t,h,h,oe,a,b);
  i.run();
  function h(i) {xOpacity(i.e, i.x);} // onRun and onTarget
};
function xOpacity(e, o)
{
  var set = xDef(o);
  //  if (set && o == 1) o = .9999; // FF1.0.2 but not needed in 1.5
  if(!(e=xGetElementById(e))) return 2; // error
  if (xStr(e.style.opacity)) { // CSS3
    if (set) e.style.opacity = o + '';
    else o = parseFloat(e.style.opacity);
  }
  else if (xStr(e.style.filter)) { // IE5.5+
    if (set) e.style.filter = 'alpha(opacity=' + (100 * o) + ')';
    else if (e.filters && e.filters.alpha) { o = e.filters.alpha.opacity / 100; }
  }
  else if (xStr(e.style.MozOpacity)) { // Gecko before CSS3 support
    if (set) e.style.MozOpacity = o + '';
    else o = parseFloat(e.style.MozOpacity);
  }
  else if (xStr(e.style.KhtmlOpacity)) { // Konquerer and Safari
    if (set) e.style.KhtmlOpacity = o + '';
    else o = parseFloat(e.style.KhtmlOpacity);
  }
  return isNaN(o) ? 1 : o; // if NaN, should this return an error instead of 1?
}

function xAnimation(r)
{
  this.res = r||10;
}
xAnimation.prototype.init = function(e,t,or,ot,oe,a,b)
{
  var i = this;
  i.e = xGetElementById(e);
  i.t = t;
  i.or=or; i.ot=ot; i.oe=oe;
  i.a = a||0;
  i.v = xAnimation.vf[i.a];
  i.qc = 1 + (b||0);
  i.fq = 1/i.t;
  if (i.a) {
    i.fq *= i.qc * Math.PI;
    if (i.a == 1 || i.a == 2) { i.fq /= 2; }
  }
  else { i.qc = 1; }
  i.xd=i.x2-i.x1; i.yd=i.y2-i.y1; i.zd=i.z2-i.z1;
};
xAnimation.prototype.run = function(r)
{
  var i = this;
  if (!r) i.t1 = new Date().getTime();
  if (!i.tmr) i.tmr = setInterval(
    function() {
      i.et = new Date().getTime() - i.t1;
      if (i.et < i.t) {
        i.f = i.v(i.et*i.fq);
        i.x=i.xd*i.f+i.x1; i.y=i.yd*i.f+i.y1; i.z=i.zd*i.f+i.z1;
        i.or(i);
      }
      else {
        clearInterval(i.tmr); i.tmr = null;
        if (i.qc%2) {i.x=i.x2; i.y=i.y2; i.z=i.z2;}
        else {i.x=i.x1; i.y=i.y1; i.z=i.z1;}
        i.ot(i);
        var rep = false;
        if (typeof i.oe == 'function') rep = i.oe(i);
        else if (typeof i.oe == 'string') rep = eval(i.oe);
        if (rep) i.resume(1);
      }
    }, i.res
  );
};
xAnimation.vf = [
  function(r){return r;},
  function(r){return Math.abs(Math.sin(r));},
  function(r){return 1-Math.abs(Math.cos(r));},
  function(r){return (1-Math.cos(r))/2;}
];
xAnimation.prototype.pause = function()
{
  clearInterval(this.tmr);
  this.tmr = null;
};
xAnimation.prototype.resume = function(fs)
{
  if (typeof this.tmr != 'undefined' && !this.tmr) {
    this.t1 = new Date().getTime();
    if (!fs) {this.t1 -= this.et;}
    this.run(!fs);
  }
};

function xGetElementById(e)
{
  if(typeof(e)=='string') {
    if(document.getElementById) e=document.getElementById(e);
    else if(document.all) e=document.all[e];
    else e=null;
  }
  return e;
}
function xDef()
{
  for(var i=0; i<arguments.length; ++i){if(typeof(arguments[i])=='undefined') return false;}
  return true;
}
function xStr(s)
{
  for(var i=0; i<arguments.length; ++i){if(typeof(arguments[i])!='string') return false;}
  return true;
}


xAnimation.prototype.line = function(e,x,y,t,a,b,oe)
{
  var i = this;
  i.x1 = xLeft(e); i.y1 = xTop(e); // start position
  i.x2 = Math.round(x); i.y2 = Math.round(y); // target position
  i.init(e,t,h,h,oe,a,b);
  i.run();
  function h(i) { // onRun and onTarget
    i.e.style.left = Math.round(i.x) + 'px';
    i.e.style.top = Math.round(i.y) + 'px';
  }
};

function xTop(e, iY)
{
  if(!(e=xGetElementById(e))) return 0;
  var css=xDef(e.style);
  if(css && xStr(e.style.top)) {
    if(xNum(iY)) e.style.top=iY+'px';
    else {
      iY=parseInt(e.style.top);
      if(isNaN(iY)) iY=xGetComputedStyle(e,'top',1);
      if(isNaN(iY)) iY=0;
    }
  }
  else if(css && xDef(e.style.pixelTop)) {
    if(xNum(iY)) e.style.pixelTop=iY;
    else iY=e.style.pixelTop;
  }
  return iY;
}

function xLeft(e, iX)
{
  if(!(e=xGetElementById(e))) return 0;
  var css=xDef(e.style);
  if (css && xStr(e.style.left)) {
    if(xNum(iX)) e.style.left=iX+'px';
    else {
      iX=parseInt(e.style.left);
      if(isNaN(iX)) iX=xGetComputedStyle(e,'left',1);
      if(isNaN(iX)) iX=0;
    }
  }
  else if(css && xDef(e.style.pixelLeft)) {
    if(xNum(iX)) e.style.pixelLeft=iX;
    else iX=e.style.pixelLeft;
  }
  return iX;
}

function xNum()
{
  for(var i=0; i<arguments.length; ++i){if(isNaN(arguments[i]) || typeof(arguments[i])!='number') return false;}
  return true;
}

function xGetComputedStyle(e, p, i)
{
  if(!(e=xGetElementById(e))) return null;
  var s, v = 'undefined', dv = document.defaultView;
  if(dv && dv.getComputedStyle){
    s = dv.getComputedStyle(e,'');
    if (s) v = s.getPropertyValue(p);
  }
  else if(e.currentStyle) {
    v = e.currentStyle[xCamelize(p)];
  }
  else return null;
  return i ? (parseInt(v) || 0) : v;
}

function xCamelize(cssPropStr)
{
  var i, c, a, s;
  a = cssPropStr.split('-');
  s = a[0];
  for (i=1; i<a.length; ++i) {
    c = a[i].charAt(0);
    s += a[i].replace(c, c.toUpperCase());
  }
  return s;
}

/*
function callBack(xa){
	delete xa;
	var obj=xGetElementById("obj");
	if(obj.style.display="block"){
		setTimeout(moveScroll,5000);
	}
}
*/
//var SCROLLTIMEOUT;
function moveScroll(){
	var xa   = new xAnimation(); 
	var obj  = xGetElementById("obj");
	var targ = xTop(obj)+38;
	if(targ==0){
		xa.line(obj, xLeft(obj), targ , 1000, 0,0,(function(xa){	var obj=xGetElementById("obj");
																						clearTimeout(obj.SCROLLTIMEOUT);
																						if(obj.parentNode.parentNode.style.visibility=="visible"){
																							xTop(obj,-76);
																							obj.SCROLLTIMEOUT=setTimeout(moveScroll,2000);
																						}
																						}));
	}else{
		xa.line(obj, xLeft(obj), targ , 1000, 0,0,(function(xa){	var obj=xGetElementById("obj");
																						clearTimeout(obj.SCROLLTIMEOUT);
																						if(obj.parentNode.parentNode.style.visibility=="visible"){
																							xTop(obj,-38);
																							obj.SCROLLTIMEOUT=setTimeout(moveScroll,2000);
																						}
																						}));
	}
}
//
//xTop("obj",-92);
//setTimeout(moveScroll,2000);