/* Animation effects for KnowHow Startscreen */

function zxcBAnimator(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime){
 if (typeof(zxcobj)=='string'){ zxcobj=document.getElementById(zxcobj); }
 if (!zxcobj||(!zxcsrt&&!zxcfin)) return;
 var zxcoop=zxcobj[zxcmde.replace(/[-#]/g,'')+'oop'];
 if (zxcoop){
  clearTimeout(zxcoop.to);
  if (zxcoop.srtfin[0]==zxcsrt&&zxcoop.srtfin[1]==zxcfin&&zxcmde.match('#')) zxcoop.update([zxcoop.data[0],(zxcoop.srtfin[0]==zxcoop.data[2])?zxcfin:zxcsrt],zxctime);
  else zxcoop.update([zxcsrt,zxcfin],zxctime);
 }
 else zxcobj[zxcmde.replace(/[-#]/g,'')+'oop']=new zxcBAnimatorOOP(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime);
}

function zxcBAnimatorOOP(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime){
 this.srtfin=[zxcsrt,zxcfin];
 this.to=null;
 this.obj=zxcobj;
 this.mde=zxcmde.replace(/[-#]/g,'');
 this.update([zxcsrt,zxcfin],zxctime);
}

zxcBAnimatorOOP.prototype.update=function(zxcsrtfin,zxctime){
 this.time=zxctime||this.time||2000;
 if (zxcsrtfin[0]==zxcsrtfin[1]) return;
 this.data=[zxcsrtfin[0],zxcsrtfin[0],zxcsrtfin[1]];
 this.srttime=new Date().getTime();
 this.cng();
}

zxcBAnimatorOOP.prototype.cng=function(){
 var zxcms=new Date().getTime()-this.srttime;
 this.data[0]=(this.data[2]-this.data[1])/this.time*zxcms+this.data[1];
 if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
 else  this.opacity(this.data[0]);
 if (zxcms<this.time) this.to=setTimeout(function(zxcoop){return function(){zxcoop.cng();}}(this), 10);
 else {
  if (this.mde!='opacity') this.obj.style[this.mde]=this.data[2]+'px';
  else  this.opacity(this.data[2]);
 }
}

zxcBAnimatorOOP.prototype.opacity=function(zxcopc){
 if (zxcopc<0||zxcopc>100){ return; }
 this.obj.style.filter='alpha(opacity='+zxcopc+')';
 this.obj.style.opacity=this.obj.style.MozOpacity=this.obj.style.KhtmlOpacity=zxcopc/100-.001;
}

function zxcSwap(zxcid,zxcimg,zxcspd){
 var zxcp=document.getElementById(zxcid);
 var zxcimg=zxcp.getElementsByTagName('IMG')[zxcimg];
 var zxcevt=window.event||arguments.callee.caller.arguments[0];
 zxcBAnimator('opacity#',zxcimg,0,100,zxcspd);
 if (zxcevt.type=='mouseover') zxcimg.style.zIndex='2';
 else zxcimg['to']=setTimeout(function(zxcimg){return function(){zxcimg.style.zIndex='0';}}(zxcimg),zxcspd);
}