"; // sand clock
var html_wait = "Загружаем с сервера, ждите."; // HTML shown before loading
var img_plus = "[+]"; // plus sign
var img_minus = "[–]"; // minus sign
//var img_plus = "
"; // minus sign
var loader_iframe = "loader"; // name of iframe of loader
//============================================================
function Elem(target, url, status) {
//============================================================
/*
Constructor. Creates new element (to load into page).
Property 'status' may be:
0 - not tried to load
1 - called loading of it into loader iframe
2+ - next tries after unsuccessful loading
tries+1 - successfully shown
Parameters:
target - after
loading of all other pages in the list.
Parameters:
target -
to load into
url - URL to load
status - start status (optional, default is 0)
Returns: Nothing.
*/
//------------------------------------------------------------
// elems.push(new Elem(target, url, status));
elems[elems.length] = new Elem(target, url, status);
}
//============================================================
function load_elem(target, url) {
//============================================================
/*
Adds new element to the list and starts loading it.
Usage:
In element page:
It starts loading of the page3.html into
immediately.
Parameters:
target -
to load into
url - URL to load
Returns: Nothing.
*/
//------------------------------------------------------------
// elems.push(new Elem(target, url));
elems[elems.length] = new Elem(target, url);
load_next();
}
//============================================================
function getFromLoader() {
//============================================================
var str_before = str_after = "";
str_before = document.all ? document.frames[0].document.getElementById("txt").innerHTML : document.getElementById(loader_iframe).contentWindow.document.getElementById("txt").innerHTML;
str_after = str_before.replace(/['"];;|;;['"]/g, '"');
return str_after;
}
//============================================================
function load_next() {
//============================================================
/*
Loads next unloaded element from array elems[] into hidden frame.
Parameters: None.
Returns: 1 - after loading an element, 2 - if all elements are loaded yet.
*/
//------------------------------------------------------------
var element, i;
// alert("load_next called");
// debug_elems("load_next");
// Defence from infinite looping
if(loop_count++ > loop_count_max) return 3;
// Defence from memory leak - cut loaded elements
try { // for IE 5.0
while(elems.length && elems[0].status >= tries) {
elems.shift();
}
} catch(e) {
// do nothing
}
// Go through elems[] and find first unloaded element
for (i in elems) {
if(elems[i].status >= tries) continue; // for IE 5.0
// Give up loading element if there are server problems
// if(elems[i].status == tries) {
// elems[i].status++;
// continue;
// }
element = elems[i];
break;
}
// Exit if all elements are loaded yet
if(!element) return 2;
// Mark it as ready to load
elems[i].status++;
// Clear element if url is empty
if(!element.url) {
document.getElementById(loader_iframe).src=""; // for Konqueror
document.getElementById(element.target).innerHTML = "";
load_next();
// Load chosen element if url is not empty
} else {
document.getElementById(element.target).innerHTML = html_wait;
try {
document.getElementById(loader_iframe).src="";
document.getElementById(loader_iframe).src=element.url;
} catch(e) {
// alert("Error catched in load_next");
load_next();
}
}
// alert("On load_next exit: " + element.url + " --> " + element.target + " / " + element.status);
return 1;
}
//============================================================
function show_me() {
//============================================================
/*
Puts element into target
after loading.
Then it starts loading next elements waiting for load by load_next().
Parameters: None.
Returns: 1 - after loading an element, 2 - if all elements are loaded yet.
*/
//------------------------------------------------------------
var element, i;
// alert("show_me called");
// debug_elems("show_me");
// Go through elems[] and show first unshown elements
for (i in elems) {
// if(elems[i].status > tries || elems[i].status == 0) continue;
if(elems[i].status > tries || elems[i].status == 0 || elems[i].url == '') continue;
element = elems[i];
break;
}
// Exit if all elements are shown yet (some error occured)
if(!element) return 2;
// Load chosen element
try {
document.getElementById(element.target).innerHTML=getFromLoader();
elems[i].status = tries + 1; // mark it as shown
} catch(e) {
// alert("Error catched in show_me");
// do nothing
}
// alert("On show_me exit: " + element.url + " --> " + element.target + " / " + element.status);
// Do the same for next element in the list
return load_next();
}
//============================================================
function open_close(id, url) {
//============================================================
/*
Opens given item if it's closed or closes it otherwise.
The item must have 2 relative items with suffices "_pm" for plus/minus
sign and "_sub" for subitem.
Example:
Dont't forget to write default image of plus sign in the "..._pm" field.
Parameters:
id - item name
url - URL to open in subitem
** TODO **
If url is empty - makes closed item (called by onLoad).
Returns: Nothing.
*/
//------------------------------------------------------------
var el_sub, img;
var empty_len = 10; // empty
Some heading text
is shorter than empty_len
var wants_open = 1;
var id_pm = id + "_sign"; // plus/minus sign
// Caller wants to open subitem or not
if(!url) {
wants_open = 0;
} else if(document.getElementById(id).innerHTML.length > empty_len) {
wants_open = 0;
}
// Determine current state of item by content of id
if(wants_open) {
img = img_minus;
add_elem(id, url);
} else {
img = img_plus;
add_elem(id, "");
}
//// Write plus sign
// if(url) { // loaded yet
// document.getElementById(id_pm).innerHTML = img;
// } else { // onLoad event in loader iframe
// if(document.all) { // hack?
// document.frames[0].document.getElementById(id_pm).innerHTML = img;
// } else {
// document.getElementById(loader_iframe).contentWindow.document.getElementById(id_pm).innerHTML = img;
// }
// }
if(document.getElementById(id_pm)) {
document.getElementById(id_pm).innerHTML = img;
}
load_next();
}
//============================================================
function debug_elems(prefix) {
//============================================================
/*
Shows content of 'elems' array by alert().
Parameters:
prefix - message prefix
Returns: Nothing.
*/
//------------------------------------------------------------
var message = prefix + ": \n";
for (i in elems) {
message += elems[i].target +" - " +elems[i].url + " (" + elems[i].status + ")\n";
}
alert(message);
}