var curImg=0;
var playMode=0;
var timerId=-1;
var interval2=2000;
var interval4=4000;
var interval6=6000;
var interval8=8000;
var interval10=10000;
var interval=interval4;
var arrPreload=new Array();
var _PRELOADRANGE=1;
/**
* Replace in myinput string, the first instance of oldstr string by the newstr string.
*
* @param myinput: the string that will be changed.
* @param oldstr: the string that will be removed from myinput.
* @param newstr: the string that will be inserted in myinput.
* @return A copy of myinput string a with the ondstr replaced by the newstr.
*/
function replaceNum(myinput, oldstr, newstr)
{
var input=myinput;
var output=myinput;
var idx=output.indexOf(oldstr);
if (idx>-1)
{
output=input.substring(0, idx);
output+=newstr;
output+=input.substr(idx+oldstr.length);
}
return output;
}
function changeSpeed(sidx)
{
switch (sidx)
{
case 0: interval=interval2; break;
case 1: interval=interval4; break;
case 2: interval=interval6; break;
case 3: interval=interval8; break;
case 4: interval=interval10; break;
default: interval=interval4;
}
if (timerId !=-1)
{
window.clearTimeout(timerId);
timerId = window.setTimeout("forward();", interval);
}
}
/**
* Function responsible for preloading a range of images, starting in
* intPic with size intRange.
*
* @param intPic: First image of the range that will be preloaded.
* @param intRange: The size of the range that will be preloaded.
* @return True when the function ends.
*/
function preloadRange(intPic, intRange)
{
for (var i=intPic; i<intPic+intRange && i<numImgs; i++){
arrPreload[i]=new Image();
arrPreload[i].src=imageSrcArray[i];
}
return true;
}
/**
* Function that creates the loop continuity.
* when the image is completely loaded, this function is called and it
*  sets a timeout with the current valid interval. When this timeout ends
*  the forward function is called again, to close the loop.
*/
function imgLoadNotify()
{
if (playMode==1){
timerId = window.setTimeout("forward();", interval);
}
}
function changeSlide()
{
if (numImgs>0)
{
if (ipjIsIE && !ipjIsOpera)
{
document.all.imgp.style.filter = "blendTrans(duration=1)";
document.all.imgp.filters.blendTrans.Apply();
}
var htmlCont = "<div align=center>" + "<br><img src=\"" + imageSrcArray[curImg] + "\" alt=\"" + imageAltTextArray[curImg] + "\"";
if (imageWidthArray[curImg]>0 && imageHeightArray[curImg]>0)
htmlCont += " width=" + imageWidthArray[curImg] + " height=" + imageHeightArray[curImg];
htmlCont += " border=0 hspace=10 vspace=10 onload=\"imgLoadNotify();\">" + "<br>";
htmlCont += "<br><span class=ipf-photogallery-text>" + imageNameArray[curImg] + "</span></div>";
var pnumLine = replaceNum(SHOWINGSTRING, "%slideNum", eval(curImg+1));
document.getElementById("pem").innerHTML = pnumLine;
document.getElementById("imgp").innerHTML = htmlCont;
if (ipjIsIE && !ipjIsOpera){
document.all.imgp.filters.blendTrans.Play();
}
}else
{
document.getElementById("imgp").innerHTML = "<div align=center><br><br><br><span class=ipf-photogallery-text>No Images to Display.</span></div>";
}
}
function forward()
{
curImg++;
if (curImg>=numImgs)
{
curImg=0;
}
else if (!arrPreload[curImg])
{
preloadRange(curImg, _PRELOADRANGE);
}
changeSlide();
}
function rewind()
{
curImg--;
if (curImg<0)
{
curImg=numImgs-1;
}
changeSlide();
}
function stop()
{
window.clearTimeout(timerId);
playMode=0;
timerId=-1;
document.playbtn.src=buttonOffArray[0];
document.stopbtn.src=buttonOnArray[1];
}
function play()
{
if (timerId==-1)
{
curImg=curImg-1;
if (curImg<0)
{
curImg=-1;
}
forward();
playMode=1;
}
document.playbtn.src=buttonOnArray[0];
document.stopbtn.src=buttonOffArray[1];
}
function setButton(direction)
{
window.clearTimeout(timerId);
timerId=-1;
if (direction==0)
{
document.prevbtn.src=buttonOnArray[2];
window.setTimeout("document.prevbtn.src = buttonOffArray[2];", 300);
}
else
{
document.fowdbtn.src=buttonOnArray[3];
window.setTimeout("document.fowdbtn.src = buttonOffArray[3];", 300);
}
}