var timerId = -1;
var intervalf = 1000;
var intervalm = 3000;
var intervals = 5000;
var interval = intervalm;
var imgIsLoaded = false;
var arrPreload = new Array();
var _PRELOADRANGE = 5;

var sub_nav_mouseover_color = "#FFFFFF";
var background_base  = "img/base/ba2.gif";

function replaceNum(myinput, token, newstr)
{
    var input = myinput;
    var output = input;
    var idx = output.indexOf(token);
    if (idx > -1)
   {
      output = input.substring(0, idx);
      output += newstr;
      output += input.substr(idx+token.length);
    }
    return output;
}

function changeSpeed(sidx)
{
    switch (sidx)
   {
      case 0: interval = intervalm; break;
      case 1: interval = intervals; break;
      default: interval = intervalf;
    }
    if (timerId != -1)
   {
      window.clearInterval(timerId);
      timerId = window.setInterval("forward();", interval);
    }
}

function preloadRange(intPic,intRange) {
   for (var i=intPic; i<intPic+intRange; i++) {
      arrPreload[i] = new Image();
      arrPreload[i].src = imageSrcArray[i];
   }
   return true;
}

function imgLoadNotify()
{
    imgIsLoaded = true;
}

function changeSlide()
{
    if (document.all)
   {
      document.all.imgp.style.filter="blendTrans(duration=1)";

      document.all.imgp.filters.blendTrans.Apply();
    }
    imgIsLoaded = false;
    var htmlCont = "<center>" +
   "<br><img id=\"" + curImg + "\" src=\"" + imageSrcArray[curImg] + "\" title=\"" + imageNameArray[curImg] + "\"";
    if (imageWidthArray[curImg] > 0 && imageHeightArray[curImg] > 0)
   {
      htmlCont += (imageHeightArray[curImg]>410)?" height=410":" width=" + imageWidthArray[curImg] + " height=" + imageHeightArray[curImg];

    }
    //htmlCont += 'width=480 height=480';
    htmlCont += " border=0 hspace=10 vspace=10 onload=\"imgLoadNotify();\">" + "<br>";
   htmlCont += "<br><span class=yphsmhdr>" + "</span></center>";
   //imageNameArray[curImg]   NAme of the IMAGE

    var prevLink='';
    var nxtLink='';
    if (curImg != 0)
    {
      prevLink='<a href="#" onclick="rewind();"><font size="2" face="Arial, Helvetica, sans-serif" color='+sub_nav_mouseover_color+'>'+TXT_Var35419+'</font></a>';
    }
    else
    {
      prevLink='<font size="2" face="Arial, Helvetica, sans-serif" color='+sub_nav_mouseover_color+'>'+TXT_Var35419+'</font>';
    }

    if (curImg != numImgs-1)
    {
      nxtLink='<a href="#" onclick="forward();"><font size="2" face="Arial, Helvetica, sans-serif" color='+sub_nav_mouseover_color+'>'+TXT_Var35421+'</font></a>';
    }
    else
    {
      nxtLink='<font size="2" face="Arial, Helvetica, sans-serif" color='+sub_nav_mouseover_color+'>'+TXT_Var35421+'</font>';
    }

    document.getElementById("Move").innerHTML =prevLink+' <font size="2" face="Arial, Helvetica, sans-serif" color='+sub_nav_mouseover_color+'> | '+nxtLink;
    document.getElementById("Move2").innerHTML =prevLink+' <font size="2" face="Arial, Helvetica, sans-serif" color='+sub_nav_mouseover_color+'> | '+nxtLink;


    document.getElementById("ImageName").innerHTML ='<font size="2" face="Arial, Helvetica, sans-serif" color="#000000"><b>'+imageNameArray[curImg]+'</b>';

    document.getElementById("ImageDesc").innerHTML ='<font size="2" face="Arial, Helvetica, sans-serif" color="#000000">'+imageDescArray[curImg];
    document.getElementById("Date").innerHTML ='<font size="2" face="Arial, Helvetica, sans-serif" color="#000000">'+TXT_Var35423+": "+'<font size="2" face="Arial, Helvetica, sans-serif" color="#000000">'+imageDateArray[curImg];
    document.getElementById("Size").innerHTML ='<font size="2" face="Arial, Helvetica, sans-serif" color="#000000">'+TXT_Var35424+": "+'<font size="2" face="Arial, Helvetica, sans-serif" color="#000000">'+imageSizeArray[curImg]/100+" kb";


    var pnumLine = '<font size="2" face="Arial, Helvetica, sans-serif" color="#000000">';
    pnumLine += replaceNum(SHOWINGSTRING1, "%slideNum", eval(curImg+1));
    pnumLine += "</font>";
    document.getElementById("pem").innerHTML = pnumLine;
    document.getElementById("imgp").innerHTML = htmlCont;

   document.getElementById("Resolution").innerHTML ="<span class='header3'>"+'<font size="2" face="Arial, Helvetica, sans-serif" color="#000000">'+TXT_Var35425+": "+document.getElementById(curImg).width+" X "+document.getElementById(curImg).height+"</span>";
   //alert(document.getElementById(curImg).width +"    "+document.getElementById(curImg).height);

    if (document.all)
      document.all.imgp.filters.blendTrans.Play();


}

function forward()
{
   if (!arrPreload[curImg+1]) {
      imgIsLoaded = false;
      imgIsLoaded = (curImg+_PRELOADRANGE<numImgs)?preloadRange(curImg+1,_PRELOADRANGE):preloadRange(curImg+1,numImgs-curImg-1);
   }
   if (imgIsLoaded)
   {
      curImg++;
      if (curImg == numImgs)
         curImg = 0;
      changeSlide();
    }
}

function rewind()
{
    curImg--;
    if (curImg < 0)
      curImg = numImgs - 1;
    changeSlide();
}

function stop()
{
    window.clearInterval(timerId);
    timerId = -1;
    document.playbtn.src = buttonImgPfx + buttonOffArray[0];
    document.stopbtn.src = buttonImgPfx + buttonOnArray[1];
    imgIsLoaded = true;
}

function play()
{
    if (timerId == -1)
      timerId = window.setInterval('forward();', interval);
    document.playbtn.src = buttonImgPfx + buttonOnArray[0];
    document.stopbtn.src = buttonImgPfx + buttonOffArray[1];
}

function setButton(direction)
{
    imgIsLoaded = true;
    if (direction == 0)
   {
      document.prevbtn.src = buttonImgPfx + buttonOnArray[2];
      window.setTimeout("document.prevbtn.src = buttonImgPfx + buttonOffArray[2];", 300);
    }
   else
   {
      document.fowdbtn.src = buttonImgPfx + buttonOnArray[3];
      window.setTimeout("document.fowdbtn.src = buttonImgPfx + buttonOffArray[3];", 300);
    }
}