/*<![CDATA[*/
// Basic Element Animator (14-May-2009)
// by Vic Phillips http://www.vicsjavascripts.org.uk

// To progressively change the Left, Top, Width, Height or Opacity of an element over a specified period of time.
// With the ability to scale the effect time on specified minimum/maximum values
// and with three types of progression 'sin' and 'cos' and liner and an optional 'Bounce'.

// **** Application Notes

// **** The HTML Code
//
// when moving an element the inline or class rule style position of the element should be assigned as
// 'position:relative;' or 'position:absolute;'.
//
// The element would normally be assigned a unique ID name.
//

// **** Executing the Effect(Script)
//
// The effect is executed by an event call to function 'zxcBAnimator('width#',document.getElementById('tst'),10,800,5000,[10,800],'sin');'
// where:
//  parameter 0 = the mode(see Note 2).                                                                     (string)
//  parameter 1 = the unique ID name or element object.                                                     (string or element object)
//  parameter 2 = the start position of the effect.                                                         (digits, for opacity minimum 0, maximum 100)
//  parameter 3 = the finish position of the effect.                                                        (digits, for opacity minimum 0, maximum 100)
//  parameter 4 = (optional) period of time between the start and finish of the effect in milliseconds.     (digits or defaults to 2000 milliSeconds)
//  parameter 5 = (optional) to scale the effect time on a specified minimum/maximum.                        (array, see Note 5)
//                 field 0 the minimum. (digits)
//                 field 1 the maximum. (digits)
//  parameter 6 = (optional) the type of progression, 'sin', 'cos' or 'liner'.                              (string, default = 'liner')
//                 'sin' progression starts fast and ends slow.
//                 'cos' progression starts slow and ends fast.
//
//  Note 1:  The default units(excepting opacity) are 'px'.
//  Note 2:  Examples modes: 'left', 'top', 'width', 'height', 'opacity.
//           For hyphenated modes, the first character after the hyphen must be upper case, all others lower case.
//  Note 3:  To 'toggle' the effect include '#' in parameter 0.
//           The first call will set the toggle parameters.
//           Subsequent calls with '#' in parameter 0 and the same start and finish parameters will 'toggle' the effect.
//  Note 4:  The function may be re-executed with a different set of parameters (start/finish time or period)
//           whenever required, say from an onclick/mouseover/out event.
//           The period parameter will be retained unless re-specified.
//  Note 5: parameter 5 is of particular use when re-calling the effect
//          in mid travel to retain an constant rate of progression.
//  Note 6: parameters 2 and 3 must be different values to execute the script.
//




// **** Functional Code - NO NEED to Change


function zxcBAnimator(mde,obj,srt,fin,ms,scale,curve){
 if (typeof(obj)=='string'){ obj=document.getElementById(obj); }
 if (!obj) return;
 var oop=obj[mde.replace(/\W/g,'')+'oop'];
 if (oop){
  if (oop.srtfin[0]==srt&&oop.srtfin[1]==fin&&mde.match('#')) oop.update([oop.data[0],(oop.srtfin[0]==oop.data[2])?fin:srt],ms,scale,curve);
  else oop.update([srt,fin],ms,scale,curve);
 }
 else oop=obj[mde.replace(/\W/g,'')+'oop']=new zxcBAnimatorOOP(mde,obj,srt,fin,ms,scale,curve);
 return oop;
}

function zxcBAnimatorOOP(mde,obj,srt,fin,ms,scale,curve){
 this.srtfin=[srt,fin];
 this.to=null;
 this.obj=obj;
 this.mde=mde.replace(/\W/g,'');
 this.update([srt,fin],ms,scale,curve);
}

zxcBAnimatorOOP.prototype.update=function(srtfin,ms,scale,curve){
 clearTimeout(this.to);
 this.time=ms||this.time||2000;
 this.data=[srtfin[0],srtfin[0],srtfin[1]];
 this.mS=this.time*(!scale?1:Math.abs((srtfin[1]-srtfin[0])/(scale[1]-scale[0])));
 this.ms=this.mS;
 this.curve=(typeof(curve)=='string')?curve.charAt(0).toLowerCase():(this.curve)?this.curve:'x';
 this.inc=Math.PI/(2*this.mS);
 this.srttime=new Date().getTime();
 this.cng();
}

zxcBAnimatorOOP.prototype.cng=function(){
 this.ms=new Date().getTime()-this.srttime;
 this.data[0]=(this.curve=='s')?Math.floor((this.data[2]-this.data[1])*Math.sin(this.inc*this.ms)+this.data[1]):(this.curve=='c')?(this.data[2])-Math.floor((this.data[2]-this.data[1])*Math.cos(this.inc*this.ms)):(this.data[2]-this.data[1])/this.mS*this.ms+this.data[1];
 this.apply();
 if (this.ms<this.mS) this.to=setTimeout(function(oop){return function(){oop.cng();}}(this),10);
 else {
  this.data[0]=this.data[2];
  this.apply();
  if (this.Bounce&&this.Bounce[2]>0) this.bounce();
 }
}

zxcBAnimatorOOP.prototype.apply=function(){
 if (isFinite(this.data[0])){
  if (this.mde!='left'&&this.mde!='top'&&this.data[0]<0) this.data[0]=0;
  if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
  else zxcOpacity(this.obj,this.data[0]);
 }
}

zxcBAnimatorOOP.prototype.bounce=function(){
 if (this.Bounce[2]%2==0)
 this.Bounce[1]+=(this.Bounce[0]-this.Bounce[1])/(this.Bounce[2])
 this.update([this.data[0],this.Bounce[this.Bounce[2]%2==0?1:0]],this.Bounce[3]/this.Bounce[2]);
 this.Bounce[2]--;
}

function zxcOpacity(obj,opc){
 if (opc<0||opc>100) return;
 obj.style.filter='alpha(opacity='+opc+')';
 obj.style.opacity=obj.style.MozOpacity=obj.style.KhtmlOpacity=opc/100-.001;
}




var ImgAry=['grpha.gif','eqtna.gif','moda.gif'];

function Fade(cls,ary){
 var imgs=zxcByClassName(cls);
 var path=imgs[0].src.substring(0,imgs[0].src.lastIndexOf('/')+1);
 this.imgs=[];
 this.objs=[];
 for (var z0=0;z0<imgs.length;z0++){
  this.objs[z0]=imgs[z0];
 }
 for (var z1=0;z1<ary.length;z1++){
  this.imgs[z1]=new Image();
  this.imgs[z1].src=path+ary[z1];
 }
 this.obj=0;
 this.img=0;
 this.NextObj();
 this.NextImg();
 this.FadeIn();
}

Fade.prototype.NextObj=function(){
var next=this.obj + 1
if (next==this.objs.length){
  this.obj=0;
  next=0;
   }
 else {
  this.obj=next;
 }
}
Fade.prototype.NextImg=function(){
 var next=this.img +1
 if (next==this.imgs.length){
  this.img=0;
  next=0;
 }
 else {
  this.img=next;
 }
}

Fade.prototype.FadeIn=function(){
 zxcBAnimator('opacity',this.objs[this.obj],0,40,1800);
 this.objs[this.obj].src=this.imgs[this.img].src
 var oop=this;
 setTimeout(function(){ oop.FadeOut(); },5000);
}

Fade.prototype.FadeOut=function(){
 zxcBAnimator('opacity',this.objs[this.obj],40,0,1800);
 this.NextObj();
 this.NextImg();
 var oop=this;
 setTimeout(function(){ oop.FadeIn(); },3000);
}

function zxcByClassName(nme,el,tag){
 if (typeof(el)=='string') el=document.getElementById(el);
 el=el||document;
 for (var tag=tag||'*',reg=new RegExp('\\b'+nme+'\\b'),els=el.getElementsByTagName(tag),ary=[],z0=0; z0<els.length;z0++){
  if(reg.test(els[z0].className)) ary.push(els[z0]);
 }
 return ary;
}