//##########################################################################
//                           * image looper *
//##########################################################################

var fig9_first_image = 1;
var fig9_last_image = 15;

//##########################################################################
// set up images (EX: .jpg .gif .png)

var fig9_image_array = new Array();
fig9_image_array[1] = "images/claudette/figure9/vis1531scale.gif";
fig9_image_array[2] = "images/claudette/figure9/vis1545scale.gif";
fig9_image_array[3] = "images/claudette/figure9/vis1601scale.gif";
fig9_image_array[4] = "images/claudette/figure9/vis1615scale.gif";
fig9_image_array[5] = "images/claudette/figure9/vis1631scale.gif";
fig9_image_array[6] = "images/claudette/figure9/vis1645scale.gif";
fig9_image_array[7] = "images/claudette/figure9/vis1701scale.gif";
fig9_image_array[8] = "images/claudette/figure9/vis1715scale.gif";
fig9_image_array[9] = "images/claudette/figure9/vis1731scale.gif";
fig9_image_array[10] = "images/claudette/figure9/vis1745scale.gif";
fig9_image_array[11] = "images/claudette/figure9/vis1815scale.gif";
fig9_image_array[12] = "images/claudette/figure9/vis1845scale.gif";
fig9_image_array[13] = "images/claudette/figure9/vis1901scale.gif";
fig9_image_array[14] = "images/claudette/figure9/vis1915scale.gif";
fig9_image_array[15] = "images/claudette/figure9/vis1931scale.gif";

//###################### time variables for loop ###########################
//normal_delay = delay between each image
//dwell_delay = delay between last image and first image

var fig9_current_image = fig9_first_image;
var fig9_image = new Array();
var fig9_normal_delay = 1000;
var fig9_dwell_delay = 3000;
var fig9_delay_increment = 100;
var fig9_delay_max = 8000;
var fig9_delay_min = 10;
var fig9_repeat_delay
var fig9_play_mode = 0;
var fig9_play_status = 0;


for (var i = fig9_first_image; i <= fig9_last_image; i++) {
   fig9_image[i] = new Image();
   fig9_image[i].src = fig9_image_array[i];
}

//##########################################################################
// check for browser compatibility

fig9_browser_name = navigator.appName;
fig9_browser_version = parseInt(navigator.appVersion);
if (fig9_browser_name == "Microsoft Internet Explorer" && fig9_browser_version >= 4) fig9_browser = "ie4";
else if (fig9_browser_name == "Netscape" && fig9_browser_version >= 3) fig9_browser = "n3";
else {
   fig9_browser = "xx";
   document.write("You need Microsoft Internet Explorer 4+ or Netscape Navigator 3+ for this page to work");
}

//##########################################################################
// sets all the modes when page loaded

function fig9_on_load() {
   fig9_current_image = fig9_first_image;
   fig9_play_status = 0;
   fig9_play_mode = 0;
   document.fig9_image.src = fig9_image[fig9_current_image].src;
}

//##########################################################################
// plays animation forward

function fig9_forward_play() {
   fig9_current_image++;
   if (fig9_current_image > fig9_last_image) {
      if (fig9_play_mode == 0) {
         fig9_current_image = fig9_first_image;
         document.fig9_image.src = fig9_image[fig9_current_image].src;
         fig9_repeat_delay = setTimeout("fig9_forward_play()", fig9_normal_delay);
      }
      if (fig9_play_mode == 1) {
         fig9_current_image = fig9_last_image - 1;
         document.fig9_image.src = fig9_image[fig9_current_image].src;
         fig9_repeat_delay = setTimeout("fig9_reverse_play()", fig9_normal_delay);
      }
      if (fig9_play_mode == 2) {
         fig9_current_image = fig9_last_image;
         fig9_stop();
      }
   }
   else {
      if (fig9_current_image == fig9_last_image) {
         document.fig9_image.src = fig9_image[fig9_current_image].src;
         fig9_repeat_delay = setTimeout("fig9_forward_play()", fig9_dwell_delay);
      }
      else {
         document.fig9_image.src = fig9_image[fig9_current_image].src;
         fig9_repeat_delay = setTimeout("fig9_forward_play()", fig9_normal_delay);
      }
   }
}

//##########################################################################
// plays animation in reverse

function fig9_reverse_play() {
   fig9_current_image--;
   if (fig9_current_image < fig9_first_image) {
      if (fig9_play_mode == 0) {
         fig9_current_image = fig9_last_image;
         document.fig9_image.src = fig9_image[fig9_current_image].src;
         fig9_repeat_delay = setTimeout("fig9_reverse_play()", fig9_normal_delay);
      }
      if (fig9_play_mode == 1) {
         fig9_current_image = fig9_first_image + 1;
         document.fig9_image.src = fig9_image[fig9_current_image].src;
         fig9_repeat_delay = setTimeout("fig9_forward_play()", fig9_normal_delay);
      }
      if (fig9_play_mode == 2) {
         fig9_current_image = fig9_first_image;
         fig9_stop();
      }
   }
   else {
      if (fig9_current_image == fig9_first_image) {
         document.fig9_image.src = fig9_image[fig9_current_image].src;
         fig9_repeat_delay = setTimeout("fig9_reverse_play()", fig9_dwell_delay);
      }
      else {
         document.fig9_image.src = fig9_image[fig9_current_image].src;
         fig9_repeat_delay = setTimeout("fig9_reverse_play()", fig9_normal_delay);
      }
   }
}

//##########################################################################
// start forward animation

function fig9_forward() {
   fig9_stop();
   fig9_play_status = 1;
   fig9_forward_play();
}

//##########################################################################
// start reverse animation

function fig9_reverse() {
   fig9_stop();
   fig9_play_status = 1;
   fig9_reverse_play();
}

//##########################################################################
// stops animation

function fig9_stop() {
   if (fig9_play_status == 1) clearTimeout(fig9_repeat_delay);
   fig9_play_status = 0;
}

//##########################################################################
// forward to next image

function fig9_forward_image() {
   fig9_stop();
   if (fig9_current_image == fig9_last_image) fig9_current_image = fig9_first_image;
   else fig9_current_image++;
   document.fig9_image.src = fig9_image[fig9_current_image].src;
}

//##########################################################################
// reverse to previous image

function fig9_reverse_image() {
   fig9_stop();
   if (fig9_current_image == fig9_first_image) fig9_current_image = fig9_last_image;
   else fig9_current_image--;
   document.fig9_image.src = fig9_image[fig9_current_image].src;
}

//##########################################################################
// go to a desired image

function fig9_goto_image(go_to) {
   fig9_stop();
   if (go_to > fig9_last_image) {
      alert("Image " + "does not exsist.");
      fig9_current_image = fig9_last_image;
   }
   else if (go_to < fig9_first_image) {
      alert("Image " + "does not exsist.");
      fig9_current_image = fig9_first_image;
   }
   else fig9_current_image = go_to;
   document.fig9_image.src = fig9_image[fig9_current_image].src;
}

//##########################################################################
// change the normal delay

function fig9_normal_speed(dvdt, delay) {
   if (dvdt == -1) fig9_normal_delay += delay;
   else if (dvdt == 1) fig9_normal_delay -= delay;
   if (fig9_normal_delay > fig9_delay_max) fig9_normal_delay = fig9_delay_max;
   else if (fig9_normal_delay < fig9_delay_min) fig9_normal_delay = fig9_delay_min;
}

//##########################################################################
// change the dwell delay

function fig9_dwell_speed(dvdt, delay) {
   if (dvdt == -1) fig9_dwell_delay += delay;
   else if (dvdt == 1) fig9_dwell_delay -= delay;
   if (fig9_dwell_delay > fig9_delay_max) fig9_dwell_delay = fig9_delay_max;
   else if (fig9_dwell_delay < fig9_delay_min) fig9_dwell_delay = fig9_delay_min;
}

//##########################################################################
// change the play mode

function fig9_change_mode(chmod) {
   fig9_play_mode = chmod;
}

//##########################################################################
// button

function button() {
}

//##########################################################################