// Basic Element Animator (21-December-2008) DRAFT
// by Vic Phillips http://www.vicsjavascripts.org.uk


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

function zxcBAnimatorOOP(mde,obj,srt,fin,time,zxccurve){
 this.srtfin=[srt,fin];
 this.to=null;
 this.obj=obj;
 this.mde=mde.replace(/[-#]/g,'');
 this.update([srt,fin],time,zxccurve);
}

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

zxcBAnimatorOOP.prototype.cng=function(){
 var ms=new Date().getTime()-this.srttime;
 this.data[0]=(this.curve=='s')?Math.floor((this.data[2]-this.data[1])*Math.sin(this.inc*ms)+this.data[1]):(this.curve=='c')?(this.data[2])-Math.floor((this.data[2]-this.data[1])*Math.cos(this.inc*ms)):(this.data[2]-this.data[1])/this.time*ms+this.data[1];
 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]);
 if (ms<this.time) this.to=setTimeout(function(oop){return function(){oop.cng();}}(this),10);
 else {
  this.data[0]=this.data[2];
  if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
  else zxcOpacity(this.obj,this.data[0]);
 }
}

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;
}

function zxcSlide(mde,id,nu,spd,ud){
 var mde=mde=='V'?['top','Top']:['left','Left'];
 var par=document.getElementById(id);
 var slide=par.getElementsByTagName('DIV')[0];
 if (!slide.inc){
  var imgs=slide.getElementsByTagName('IMG');
  slide.inc=imgs[nu]['offset'+mde[1]]-SVInt(imgs[nu],'margin-'+mde[1])
  slide.pos=0;
  slide.min=imgs[imgs.length-nu]['offset'+mde[1]]-SVInt(imgs[nu],'margin-'+mde[1]);
 alert(slide.min);
 }
 slide.pos=Math.min(Math.max(slide.pos+=slide.inc*ud,-slide.min),0);
 zxcBAnimator(mde[0],slide,SVInt(slide,mde[0]),slide.pos,spd);

}
function SVInt(obj,par){
 if (obj.currentStyle) return parseInt(obj.currentStyle[par.replace(/-/g,'')]);
 return parseInt(document.defaultView.getComputedStyle(obj,null).getPropertyValue(par.toLowerCase()));
}