var piImg=new Array("images/ct_ptu.gif", "images/ct_ptd.gif",
                    "images/ct_plu.gif", "images/ct_pld.gif",
                    "images/ct_stu.gif", "images/ct_std.gif",
                    "images/ct_ntu.gif", "images/ct_ntd.gif");

var piImg2=new Array();

for(var i=0;i<piImg.length;i++) {
  piImg2[i]=new Image();
  piImg2[i].src=piImg[i];
}

var tList=new Array("blank","FlyingFast");

var cTrack=1;
var inplay=0;
var inprev=0;
var innext=0;
var kdel=300;

function playTrack() {
  var n=tList[cTrack];
  inplay=1;
  document.ctplay.src=piImg2[(cTrack==0 ? 2 : 3)].src;
  parent.frames.ctpTrax.location.replace("trax/"+n+".html");
  mb.interrupt(cTrack,1);
}

function uiStop() {
  document.ctstop.src=piImg2[4].src;
  document.ctplay.src=piImg2[2].src;
}

function stopTrack() {
  if(inplay) {
    document.ctstop.src=piImg2[5].src;
    parent.frames.ctpTrax.location.replace("trax/blank.html");
    inplay=0;
    setTimeout("uiStop()", kdel);
  }
}

function uiPrev() {
  document.ctprev.src=piImg2[0].src;
  inprev=0;
}

function prevTrack() {
  if(!inprev) {
    inprev=1;
    document.ctprev.src=piImg2[1].src;
    cTrack=cTrack-1;
    if(cTrack<0) cTrack=tList.length-1;
    setTimeout("uiPrev()", kdel);
    playTrack();
  }
}

function uiNext() {
  document.ctnext.src=piImg2[6].src;
  innext=0;
}

function nextTrack() {
  if(!innext) {
    innext=1;
    document.ctnext.src=piImg2[7].src;
    cTrack=cTrack+1;
    if(cTrack>=tList.length) cTrack=0;
    setTimeout("uiNext()", kdel);
    playTrack();
  }
}