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How to use js to figure out if a file exists?

I am writing an HTML JavaScript app to dynamically update reports that have been generated by our report server. The reports are in HTML. The problem comes when there are empty pages. I get an error 404, which we all know that the page doesn't exist. I am trying to write the code to skip the pages that don't exist. Any help would be appreciated. This is all internal to our network, so Active X all the way open is ok.

PLEASE HELP!!!!!!!!!!

Below is my code...

Expand|Select|Wrap|Line Numbers
  1. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  2. <!--
  3. SlideShow v1.0
  4.  
  5. Simply define your "slides" in the javascript slides[] array below.
  6. -->
  7. <html>
  8. <head>
  9. <title>SiteShow 1.0</title>
  10. <meta http-equiv="content-type" content="text/html; charset=windows-1250">
  11.  
  12. <style>
  13. /* Change body background-color to change fade out color. */
  14. body.siteshow { margin:0; padding:0; background-color:#000000; }
  15. #menu
  16. {
  17.     font-family:Arial;
  18.     font-size:9pt;
  19.     display:none;
  20.     opacity:0.00;
  21.     -mozopacity:0.00;
  22.     filter:alpha(opacity=0);
  23.     position:absolute;
  24.     top:10px;
  25.     left:1100px;
  26.     padding:5px;
  27.     background-color:#000000;
  28.     color:#FFFFFF;
  29.     border:3px dotted #999999;
  30. }
  31. #menu a { color:#ffffff; }
  32. #menu a:hover { text-decoration:none; }
  33. #title { font-size:11pt; font-weight:bold; letter-spacing:2; }
  34. #slides { font-size:9pt; line-height:16pt; }
  35. .button { width:60px; font-size:9pt; letter-spacing:1; }
  36. </style>
  37.  
  38. <script type="text/javascript">
  39. var current_idx = 0;
  40. var slides = new Array();
  41. var menuwin;
  42. var show_timer;
  43. var menu_timer;
  44. var menu;
  45. var content;
  46. var loaded = true;
  47. var time = 4;
  48. var html = "";
  49. var x = 1;
  50.  
  51. // Define your "slides". 3 values for each are:
  52. //      1. Duration in seconds.
  53. //      2. Title to be used in menu.
  54. //      3. Source URL. Can be full URI or a relative URL.
  55.  
  56. var fso  = new ActiveXObject("Scripting.FileSystemObject"); 
  57. var fh = fso.CreateTextFile("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID.htm", true); 
  58. fh = fopen(getScriptPath("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID.htm"), 0); // Open the file for reading 
  59. if(fh!=-1) {
  60.    slides[x] = new Array(time, "Slide 1", "X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID.htm");
  61.    x=x+1;
  62. }
  63.  
  64. fh = fopen(getScriptPath("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID1.htm"), 0); // Open the file for reading 
  65. if(fh!=-1) {
  66.    slides[x] = new Array(time, "Slide 1", "X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID1.htm");
  67.    x=x+1;
  68. }    
  69.  
  70. fh = fopen(getScriptPath("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID2.htm"), 0); // Open the file for reading 
  71. if(fh!=-1) {
  72.    slides[x] = new Array(time, "Slide 1", "X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID2.htm");
  73.    x=x+1;
  74. }    
  75.  
  76. fh = fopen(getScriptPath("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID3.htm"), 0); // Open the file for reading 
  77. if(fh!=-1) {
  78.    slides[x] = new Array(time, "Slide 1", "X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID3.htm");
  79.    x=x+1;
  80. }    
  81.  
  82. fh = fopen(getScriptPath("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID4.htm"), 0); // Open the file for reading 
  83. if(fh!=-1) {
  84.    slides[x] = new Array(time, "Slide 1", "X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID4.htm");
  85.    x=x+1;
  86. }    
  87.  
  88. fh = fopen(getScriptPath("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID5.htm"), 0); // Open the file for reading 
  89. if(fh!=-1) {
  90.    slides[x] = new Array(time, "Slide 1", "X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID5.htm");
  91.    x=x+1;
  92. }    
  93.  
  94. fh = fopen(getScriptPath("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID6.htm"), 0); // Open the file for reading 
  95. if(fh!=-1) {
  96.    slides[x] = new Array(time, "Slide 1", "X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID6.htm");
  97.    x=x+1;
  98. }    
  99.  
  100. fh = fopen(getScriptPath("X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_IDLast.htm"), 0); // Open the file for reading 
  101. if(fh!=-1) {
  102.    slides[x] = new Array(time, "Slide 1", "X:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_IDLast.htm");
  103.    x=x+1;
  104. }    
  105.  
  106.  
  107.  
  108.  
  109.  
  110. function MenuInit()
  111. {
  112.     var html = "";
  113.     for(idx=1; idx<slides.length; idx++) {
  114.         html += '<a href="javascript:Navigate('+idx+')">' +
  115.             slides[idx][1] + "</a><br />\n";
  116.     }
  117.     document.getElementById("slides").innerHTML = html;
  118.     menu.style.display = "block";
  119. }
  120.  
  121. function MenuShow()
  122. {
  123.    clearTimeout(menu_timer);
  124.     opacity('menu', 0, 90, 500);
  125.     menu_timer = setTimeout("MenuHide()", 3500);
  126. }
  127.  
  128. function MenuHide()
  129. {
  130.     opacity('menu', 90, 0, 500);
  131. }
  132.  
  133. function Pause()
  134. {
  135.     clearTimeout(show_timer);
  136.     document.getElementById('play').style.display = "block";
  137.     document.getElementById('pause').style.display = "none";
  138. }
  139.  
  140. function Navigate(slide_idx)
  141. {
  142.     clearTimeout(show_timer);
  143.     if (current_idx == 0) {
  144.         if (!slide_idx) { slide_idx = 1; }
  145.         current_idx = slide_idx;
  146.         content.src = slides[current_idx][2];
  147.         document.getElementById('play').style.display = "none";
  148.         document.getElementById('pause').style.display = "block";
  149.         show_timer = setTimeout("Navigate()", slides[current_idx][0]*1000);
  150.         return;
  151.     }
  152.  
  153.     if (slide_idx) {
  154.         current_idx = slide_idx;
  155.         content.src = slides[current_idx][2];
  156.         document.getElementById('play').style.display = "block";
  157.         document.getElementById('pause').style.display = "none";
  158.         return;
  159.     }
  160.  
  161.     loaded = false;
  162.     current_idx++;
  163.     if ( current_idx == slides.length) { current_idx = 1; }
  164.     opacity('content', 100, 0, 500);
  165.     document.getElementById('play').style.display = "none";
  166.     document.getElementById('pause').style.display = "block";
  167.     show_timer = setTimeout("Navigate()", slides[current_idx][0]*1000);
  168.     return;   
  169. }
  170.  
  171. function opacity(id, opacStart, opacEnd, millisec)
  172. {
  173.     //speed for each frame
  174.     var speed = 0;
  175.     // Math.round(millisec / 50);
  176.     var timer = 0;
  177.  
  178.     //determine the direction for the blending, if start and end are the same nothing happens
  179.     if(opacStart > opacEnd) {
  180.         for(i = opacStart; i >= opacEnd; i--) {
  181.             setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
  182.             timer++;
  183.         }
  184.         if (opacEnd == 0) { setTimeout("FadeOutTrigger('"+id+"')",((timer-1) * speed));; }
  185.         //if (opacEnd == 0) { FadeOutTrigger(id); }
  186.     } else if(opacStart < opacEnd) {
  187.         if (opacStart == 0) { FadeInTrigger(id); }
  188.         for(i = opacStart; i <= opacEnd; i++)
  189.             {
  190.             setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
  191.             timer++;
  192.         }
  193.     }
  194. }
  195.  
  196. //change the opacity for different browsers
  197. function changeOpac(opacity, id)
  198. {
  199.     var object = document.getElementById(id).style;
  200.     object.opacity = (opacity / 100);
  201.     object.MozOpacity = (opacity / 100);
  202.     object.KhtmlOpacity = (opacity / 100);
  203.     object.filter = "alpha(opacity=" + opacity + ")";
  204. }
  205.  
  206. function FadeOutTrigger(id)
  207. {
  208.     //alert('FadeOut: '+id);
  209.     switch(id) {
  210.     case "menu":
  211.         document.getElementById(id).style.display = "none";
  212.         break;
  213.     case "content":
  214.         content.src = slides[current_idx][2];
  215.         //setTimeout("opacity('content', 0, 100, 500)", 1000);
  216.         break;
  217.     default:
  218.         break;
  219.     }
  220. }
  221.  
  222. function FadeInTrigger(id)
  223. {
  224.     //alert('FadeIn: '+id);
  225.     switch(id) {
  226.     case "menu":
  227.         document.getElementById(id).style.display = "block";
  228.         break;
  229.     case "content":
  230.         //opacity('content', 0, 100, 500);
  231.         break;
  232.     default:
  233.         break;
  234.     }
  235. }
  236.  
  237. function FadeInContent()
  238. {
  239.     Html2Load();
  240.     if (!loaded) {
  241.         opacity('content', 0, 100, 500);
  242.         loaded = true;
  243.     }
  244. }
  245.  
  246. function LoadTrigger()
  247. {
  248.     //self.resizeTo(1366,768);
  249.     menu = document.getElementById('menu');
  250.     var html = "";
  251.     for(idx=1; idx<slides.length; idx++) {
  252.         html += '<a href="javascript:Navigate('+idx+')">' +
  253.             slides[idx][1] + "</a><br />\n";
  254.     }
  255. //    checkUrl(html);
  256.     content = document.getElementById('content');
  257.     Navigate();
  258.     MenuInit();
  259.     MenuShow();
  260. }
  261.  
  262. window.onload = LoadTrigger;
  263.  
  264. </script>
  265.  
  266. </head>
  267. <body class="siteshow">
  268. <iframe id="content" name="content" style="width:100%; height:100%;" frameborder="no" scrolling="auto" src="" onmouseover="MenuShow();" onload="FadeInContent();" ></iframe>
  269. <div id="menu">
  270.     <div id="title">Display Menu</div>
  271.     <div id="slides">
  272.     </div>
  273.     <p>
  274.         <input id="pause" class="button" style="display:block;" type="button" value="pause" onclick="Pause()" />
  275.         <input id="play" class="button" style="display:none;" type="button" value="play" onclick="Navigate()" />
  276.     </p>
  277. </div>
  278. </body>
  279. </html>
Jan 4 '11 #1
11 2300
Dormilich
8,658 Expert Mod 8TB
not sure what ActiveX has in stock, but in JavaScript you can make an AJAX HEAD request (to the server), which only returns the file response headers (which hold the 404 status).
Jan 4 '11 #2
Is that something I can put in my code that was provided on the first post. Can you help?
Jan 4 '11 #3
Rabbit
12,516 Expert Mod 8TB
The Scripting.FileSystemObject object has a FileExists method.
Jan 4 '11 #4
Is this how I would use the code?


Expand|Select|Wrap|Line Numbers
  1. var x = 1;
  2. var fso  = new Scripting.FileSystemObject("Scripting.FileSystemObject"); 
  3. var fh = fso.FileExists("I:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID.htm", true); 
  4.  if(fh!=-1) {
  5.    slides[x] = new Array(time, "Slide 1", "I:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID.htm");
  6.    x=x+1;
  7. }
Jan 4 '11 #5
I have tried what I think is everything. I keep getting an error "Automation server can't create object" any ideas what I need to do?
Jan 4 '11 #6
Rabbit
12,516 Expert Mod 8TB
myObject = new ActiveXObject("Scripting.FileSystemObject");
Jan 4 '11 #7
This is what I have and I am still getting this error "Automation server can't create object" Do I not have my Internet Explorer setting set properly for ActiveX? Or is there something I am missing?

Expand|Select|Wrap|Line Numbers
  1. var myObject = new ActiveXObject("Scripting.FileSystemObject"); 
  2. if (myObject.FileExists("I:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID.htm")) {
  3.     slides[x] = new Array(time, "Slide 1", "I:\\CrystalReports\\CurrentLaborByWO\\CurrentLaborByWO_ID.htm");
  4.     x=x+1;
  5. }
Jan 4 '11 #8
Rabbit
12,516 Expert Mod 8TB
That's possible. Check your ActiveX settings and see if something is blocking it. I normally have no problems doing what you're trying to do. Except I use VBScript instead of JavaScript.
Jan 4 '11 #9
Rabbit,

Thanks for you help ... end of the day today so I will start up in the morning.
Jan 4 '11 #10
Which is best VBScript of JavaScript for this situation?
Jan 4 '11 #11
Rabbit
12,516 Expert Mod 8TB
VBScript is easier, JavaScript is more powerful and flexible. It's up to you really, whichever one you're more comfortable with. If it can be done in VBScript, then it can be done in JavaScript. It's probably just some setting preventing it from being run. Are you trying to do this from an HTML file? Change the extension to an HTA file and see if that works.
Jan 4 '11 #12

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