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Block a JavaScript function in a page

I have a javascript function for a slider in the JS file of my site. When we are in a page where the slider is not called or there is no trigger element, it displays an error in the console "Uncaught TypeError: Cannot read properties of null (reading 'querySelector') ", This error is not displayed when the slider is in the page.
I would like to know how to avoid this error, and how to prevent this function from loading in pages where this slider is not present?
function slider(set) {
const sliderContainer = document.querySelector(set.name),
slider = sliderContainer.querySelector('.slider'),
sliderItem = slider.querySelectorAll('.slider__item'),
sliderArrows = sliderContainer.querySelectorAll('.arrows__item');
let dotsCreate,
dotsClass,
dotsFunk,
numberSlider,
numberSliderWork,
sliderExecutionLine,
sliderExecutionLineWork;
// calculate the maximum width of all slides
function forSliderItem(t) {
t = 0;
for(let i = 0; i < sliderItem.length - 1; i++) {
t += sliderItem[i].clientWidth;
}
return t;
}
let maxWidth = forSliderItem(sliderItem), // maximum width of all slides
slidWidth = 0, // main variable for calculating the movement of the slider
count = 0; // counter
//===== flip left
sliderArrows[0].addEventListener('click', function() {
if(count !== 0) {
count--;
slidWidth -= sliderItem[count].clientWidth;
slider.style.transform = `translateX(-${slidWidth}px)`;
} else {
count = sliderItem.length - 1;
slidWidth = maxWidth;
slider.style.transform = `translateX(-${slidWidth}px)`;
}
if(set.dots) {
dotsFunk();
}
if(set.numberSlid) {
numberSliderWork(count);
}
if(set.line) {
sliderExecutionLineWork(count);
}
});
//===== flip right
sliderArrows[1].addEventListener('click', function() {
if(count < sliderItem.length - 1) {
count++;
slidWidth += sliderItem[count].clientWidth;
slider.style.transform = `translateX(-${slidWidth}px)`;
} else {
count = 0;
slidWidth = 0;
slider.style.transform = `translateX(-${slidWidth}px)`;
}
if(set.dots) {
dotsFunk();
}
if(set.numberSlid) {
numberSliderWork(count);
}
if(set.line) {
sliderExecutionLineWork(count);
}
});
//===== dots
if(set.dots) {
dotsCreate = function() {
const dotContainer = document.createElement('div'); // create dots container
dotContainer.classList.add('dots');
// create the required number of dots and insert a container into the dots
sliderItem.forEach(() => {
let dotsItem = document.createElement('span');
dotContainer.append(dotsItem);
});
sliderContainer.append(dotContainer);
};
dotsCreate();
// add the class to the desired dots, and remove from the rest
dotsClass = function(remove, add) {
remove.classList.remove('dots_active');
add.classList.add('dots_active');
};
// move slides by clicking on the dot
dotsFunk = function() {
const dotsWork = sliderContainer.querySelectorAll('.dots span'); // we get dots
dotsWork.forEach((item, i) => {
dotsClass(dotsWork[i], dotsWork[count]);
item.addEventListener('click', function() {
count = i;
// multiply the slide size by the number of the dots, and get the number by which you need to move the slider
slidWidth = sliderItem[0].clientWidth * i;
slider.style.transform = `translateX(-${slidWidth}px)`;
for(let j = 0; j < dotsWork.length; j++) {
dotsClass(dotsWork[j], dotsWork[count]);
}
if(set.dots && set.numberSlid) {
numberSliderWork(count);
}
if(set.line) {
sliderExecutionLineWork(count);
}
});
});
};
dotsFunk();
}
//===== count slider
if(set.numberSlid) {
numberSlider = function(item) {
const countContainer = document.createElement('div'),
sliderNumber = document.createElement('span'),
slash = document.createElement('span'),
allSliderNumber = document.createElement('span');
casClient = document.createElement('p');
sliderNumber.innerHTML = item + 1;
casClient.innerHTML = 'Cas client N°';
slash.innerHTML = '/';
allSliderNumber.innerHTML = sliderItem.length;
countContainer.classList.add('count-slides');
countContainer.append(casClient, sliderNumber, slash, allSliderNumber);
sliderContainer.append(countContainer);
};
numberSlider(0);
numberSliderWork = function(item) {
const sliderNumberNow = sliderContainer.querySelector('.count-slides span');
sliderNumberNow.innerHTML = item + 1;
if(set.line) {
sliderExecutionLineWork(item);
}
};
}
}
slider({
name: ".video_users",
numberSlid: true
});
<!DOCTYPE html>
<html lang="fr">
<head>
<title>Example of a page without the slider</title>
</head>
<body class="error_404">
<h1>Example of a page without the slider</h1>
<script src="media/js/faveod.js" async></script>
</body>
</html>

Just return if the element isn't present if you don't want it to show an error.
const sliderContainer = document.querySelector(set.name);
if (!sliderContainer) return;
const slider = sliderContainer.querySelector('.slider'),
sliderItem = slider.querySelectorAll('.slider__item'),
sliderArrows = sliderContainer.querySelectorAll('.arrows__item');
If you want it to only execute on certain pages, then just add:
if (location.pathname !== '/the/page/with/slider') return;
to the beginning of the function

/*
* SCROLLBAR 2 COLUMN / SOLUTIONS
*/
var ssb = {
aConts : [],
mouseY : 0,
N : 0,
asd : 0, /*active scrollbar element*/
sc : 0,
sp : 0,
to : 0,
// constructor
scrollbar : function (cont_id) {
var cont = document.getElementById(cont_id);
// perform initialization
if (! ssb.init()) return false;
var cont_clone = cont.cloneNode(false);
cont_clone.style.overflow = "hidden";
cont.parentNode.appendChild(cont_clone);
cont_clone.appendChild(cont);
cont.style.position = 'absolute';
cont.style.left = cont.style.top = '0px';
cont.style.width = cont.style.height = '100%';
// adding new container into array
ssb.aConts[ssb.N++] = cont;
cont.sg = false;
//creating scrollbar child elements
cont.st = this.create_div('ssb_st', cont, cont_clone);
cont.sb = this.create_div('ssb_sb', cont, cont_clone);
cont.su = this.create_div('ssb_up', cont, cont_clone);
cont.sd = this.create_div('ssb_down', cont, cont_clone);
// on mouse down processing
cont.sb.onmousedown = function (e) {
if (! this.cont.sg) {
if (! e) e = window.event;
ssb.asd = this.cont;
this.cont.yZ = e.screenY;
this.cont.sZ = cont.scrollTop;
this.cont.sg = true;
// new class name
this.className = 'ssb_sb ssb_sb_down';
}
return false;
}
// on mouse down on free track area - move our scroll element too
cont.st.onmousedown = function (e) {
if (! e) e = window.event;
ssb.asd = this.cont;
ssb.mouseY = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
for (var o = this.cont, y = 0; o != null; o = o.offsetParent) y += o.offsetTop;
this.cont.scrollTop = (ssb.mouseY - y - (this.cont.ratio * this.cont.offsetHeight / 2) - this.cont.sw) / this.cont.ratio;
this.cont.sb.onmousedown(e);
}
// onmousedown events
cont.su.onmousedown = cont.su.ondblclick = function (e) { ssb.mousedown(this, -1); return false; }
cont.sd.onmousedown = cont.sd.ondblclick = function (e) { ssb.mousedown(this, 1); return false; }
//onmouseout events
cont.su.onmouseout = cont.su.onmouseup = ssb.clear;
cont.sd.onmouseout = cont.sd.onmouseup = ssb.clear;
// on mouse over - apply custom class name: ssb_sb_over
cont.sb.onmouseover = function (e) {
if (! this.cont.sg) this.className = 'ssb_sb ssb_sb_over';
return false;
}
// on mouse out - revert back our usual class name 'ssb_sb'
cont.sb.onmouseout = function (e) {
if (! this.cont.sg) this.className = 'ssb_sb';
return false;
}
// onscroll - change positions of scroll element
cont.ssb_onscroll = function () {
this.ratio = (this.offsetHeight - 2 * this.sw) / this.scrollHeight;
this.sb.style.top = Math.floor(this.sw + this.scrollTop * this.ratio) + 'px';
}
// scrollbar width
cont.sw = 16;
// start scrolling
cont.ssb_onscroll();
ssb.refresh();
// binding own onscroll event
cont.onscroll = cont.ssb_onscroll;
return cont;
},
// initialization
init : function () {
if (window.oper || (! window.addEventListener && ! window.attachEvent)) { return false; }
// temp inner function for event registration
function addEvent (o, e, f) {
if (window.addEventListener) { o.addEventListener(e, f, false); ssb.w3c = true; return true; }
if (window.attachEvent) return o.attachEvent('on' + e, f);
return false;
}
// binding events
addEvent(window.document, 'mousemove', ssb.onmousemove);
addEvent(window.document, 'mouseup', ssb.onmouseup);
addEvent(window, 'resize', ssb.refresh);
return true;
},
// create and append div finc
create_div : function(c, cont, cont_clone) {
var o = document.createElement('div');
o.cont = cont;
o.className = c;
cont_clone.appendChild(o);
return o;
},
// do clear of controls
clear : function () {
clearTimeout(ssb.to);
ssb.sc = 0;
return false;
},
// refresh scrollbar
refresh : function () {
for (var i = 0, N = ssb.N; i < N; i++) {
var o = ssb.aConts[i];
o.ssb_onscroll();
o.sb.style.width = o.st.style.width = o.su.style.width = o.su.style.height = o.sd.style.width = o.sd.style.height = o.sw + 'px';
o.sb.style.height = Math.ceil(Math.max(o.sw * .5, o.ratio * o.offsetHeight) + 1) + 'px';
}
},
// arrow scrolling
arrow_scroll : function () {
if (ssb.sc != 0) {
ssb.asd.scrollTop += 6 * ssb.sc / ssb.asd.ratio;
ssb.to = setTimeout(ssb.arrow_scroll, ssb.sp);
ssb.sp = 32;
}
},
/* event binded functions : */
// scroll on mouse down
mousedown : function (o, s) {
if (ssb.sc == 0) {
// new class name
o.cont.sb.className = 'ssb_sb ssb_sb_down';
ssb.asd = o.cont;
ssb.sc = s;
ssb.sp = 100;
ssb.arrow_scroll();
}
},
// on mouseMove binded event
onmousemove : function(e) {
if (! e) e = window.event;
// get vertical mouse position
ssb.mouseY = e.screenY;
if (ssb.asd.sg) ssb.asd.scrollTop = ssb.asd.sZ + (ssb.mouseY - ssb.asd.yZ) / ssb.asd.ratio;
},
// on mouseUp binded event
onmouseup : function (e) {
if (! e) e = window.event;
var tg = (e.target) ? e.target : e.srcElement;
if (ssb.asd && document.releaseCapture) ssb.asd.releaseCapture();
// new class name
if (ssb.asd) ssb.asd.sb.className = (tg.className.indexOf('scrollbar') > 0) ? 'ssb_sb ssb_sb_over' : 'ssb_sb';
document.onselectstart = '';
ssb.clear();
ssb.asd.sg = false;
}
}
window.onload = function() {
ssb.scrollbar('container'); // scrollbar initialization
}

jQuery Appear Function

I'm trying to use the jQuery appear plugin. I'm having trouble making it work. I tried to attach it to the (window).scroll event but it makes the page slow. If I don't use the scroll, it only fires once. I need it to work again whenever the element becomes visible. Can you give me some tips on how to make it work.
Here's my code:
jQuery('.home-section-1').appear(function(){
jQuery('.page-scroll-indicator .fa.fa-circle').removeClass('active-ind');
jQuery('.page-scroll-indicator .section-1').addClass('active-ind');
});

As ɴ-ᴀ-ᴛ-ʜ said in his comment, you need to be using .on to listen for the appear event.
jQuery('.home-section-1').on('appear', function(){
jQuery('.page-scroll-indicator .fa.fa-circle').removeClass('active-ind');
jQuery('.page-scroll-indicator .section-1').addClass('active-ind');
});
Here's a code snippit showing it working, you'll notice that your method (Method 1) doesn't fire, while the method above (Method 2) does:
/*
* jQuery appear plugin
*
* Copyright (c) 2012 Andrey Sidorov
* licensed under MIT license.
*
* https://github.com/morr/jquery.appear/
*
* Version: 0.3.4
*/
(function($) {
var selectors = [];
var check_binded = false;
var check_lock = false;
var defaults = {
interval: 250,
force_process: false
}
var $window = $(window);
var $prior_appeared;
function process() {
check_lock = false;
for (var index = 0, selectorsLength = selectors.length; index < selectorsLength; index++) {
var $appeared = $(selectors[index]).filter(function() {
return $(this).is(':appeared');
});
$appeared.trigger('appear', [$appeared]);
if ($prior_appeared) {
var $disappeared = $prior_appeared.not($appeared);
$disappeared.trigger('disappear', [$disappeared]);
}
$prior_appeared = $appeared;
}
}
// "appeared" custom filter
$.expr[':']['appeared'] = function(element) {
var $element = $(element);
if (!$element.is(':visible')) {
return false;
}
var window_left = $window.scrollLeft();
var window_top = $window.scrollTop();
var offset = $element.offset();
var left = offset.left;
var top = offset.top;
if (top + $element.height() >= window_top &&
top - ($element.data('appear-top-offset') || 0) <= window_top + $window.height() &&
left + $element.width() >= window_left &&
left - ($element.data('appear-left-offset') || 0) <= window_left + $window.width()) {
return true;
} else {
return false;
}
}
$.fn.extend({
// watching for element's appearance in browser viewport
appear: function(options) {
var opts = $.extend({}, defaults, options || {});
var selector = this.selector || this;
if (!check_binded) {
var on_check = function() {
if (check_lock) {
return;
}
check_lock = true;
setTimeout(process, opts.interval);
};
$(window).scroll(on_check).resize(on_check);
check_binded = true;
}
if (opts.force_process) {
setTimeout(process, opts.interval);
}
selectors.push(selector);
return $(selector);
}
});
$.extend({
// force elements's appearance check
force_appear: function() {
if (check_binded) {
process();
return true;
};
return false;
}
});
})(jQuery);
// Your method
jQuery('.home-section-1').appear(function(){
alert('Method 1');
});
// Using .on
jQuery('.home-section-1').on('appear', function(){
alert('Method 2');
});
.home-section-1 {
margin-top: 2000px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="home-section-1">Hello World</div>

How to make this slider to auto play?

i have download the slider from this Site
I am trying to get this Slider to auto play but I can't seem to get it to work, Does anyone know how I can achieve this? i tried to play with the below code but can not get what i want.
function init() {
[].forEach.call(document.querySelectorAll('.tt-grid-wrapper'), function (el) {
var grid = el.querySelector('.tt-grid'),
items = [].slice.call(grid.querySelectorAll('li')),
navDots = [].slice.call(el.querySelectorAll('nav > a')),
isAnimating = false,
current = 0;
navDots.forEach(function (el, i) {
el.addEventListener(eventtype, function (ev) {
if (isAnimating || current === i) return false;
ev.preventDefault();
isAnimating = true;
updateCurrent(i);
loadNewSet(i);
});
});

You can try something like this:
function init() {
[].forEach.call(document.querySelectorAll('.tt-grid-wrapper'), function (el) {
var grid = el.querySelector('.tt-grid'),
items = [].slice.call(grid.querySelectorAll('li')),
navDots = [].slice.call(el.querySelectorAll('nav > a')),
isAnimating = false,
current = 0;
navDots.forEach(function (el, i) {
el.addEventListener(eventtype, function (ev) {
if (isAnimating || current === i) return false;
ev.preventDefault();
isAnimating = true;
updateCurrent(i);
loadNewSet(i);
});
});
var delay = 1000;
var num_frames = 4;
var i = 1;
setTimeout( function() {
if (isAnimating || current === i) return false;
isAnimating = true;
updateCurrent(i);
loadNewSet(i);
i >= 4 ? i = 0 : i++;
} , delay);
};

Up/Down/Left/Right keyboard navigation with jQuery?

I have a list of div's all with a set and equal height/width that are float:left so they sit next to each other and fold under if that parent is smaller than the combined with of the items.
Pretty standard.
This is to create a list of the twitter bootstrap icons, it gives something like this:
I have added next/previous keyboard navigation using the code below, however you will notice that the up/down arrow keys are mapped to call the left/right functions. What I have no idea how to do is to actually do the up/down navigation?
JsFiddle
(function ($) {
$.widget("ui.iconSelect", {
// default options
options: {
},
$select: null,
$wrapper: null,
$list: null,
$filter: null,
$active: null,
icons: {},
keys: {
left: 37,
up: 38,
right: 39,
down: 40
},
//initialization function
_create: function () {
var that = this;
that.$select = that.element;
that.$wrapper = $('<div class="select-icon" tabindex="0"></div>');
that.$filter = $('<input class="span12" tabindex="-1" placeholder="Filter by class name..."/>').appendTo(that.$wrapper);
that.$list = $('<div class="select-icon-list"></div>').appendTo(that.$wrapper);
//build the list of icons
that.element.find('option').each(function () {
var $option = $(this);
var icon = $option.val();
that.icons[icon] = $('<a data-class="' + icon + '"><i class="icon ' + icon + '"></i></a>');
if ($option.is(':selected')) {
that.icons[icon].addClass('selected active');
}
that.$list.append(that.icons[icon]);
});
that.$wrapper.insertBefore(that.$select);
that.$select.addClass('hide');
that._setupArrowKeysHandler();
that._setupClickHandler();
that._setupFilter();
that.focus('selected');
},
focus: function (type) {
var that = this;
if (that.$active === null || that.$active.length == 0) {
if (type == 'first') {
that.$active = that.$list.find('a:visible:first');
} else if (type == 'last') {
that.$active = that.$list.find('a:visible:last');
} else if (type == 'selected') {
that.$active = that.$list.find('a.selected:visible:first');
that.focus('first');
}
}
that.$active.addClass('active');
var toScroll = ((that.$list.scrollTop() + that.$active.position().top)-that.$list.height()/2)+that.$active.height()/2;
//that.$list.scrollTop((that.$list.scrollTop() + top)-that.$list.height()/2);
that.$list.stop(true).animate({
scrollTop: toScroll,
queue: false,
easing: 'linear'
}, 200);
if (type === 'selected') {
return false;
}
that.$select.val(that.$active.data('class'));
that.$select.trigger('change');
},
_setupArrowKeysHandler: function () {
var that = this;
that.$wrapper.on('keydown', function (e) {
switch (e.which) {
case that.keys.left:
that.moveLeft();
break;
case that.keys.up:
that.moveUp();
break;
case that.keys.right:
that.moveRight();
break;
case that.keys.down:
that.moveDown();
break;
case 16:
return true;
case 9:
return true;
break;
default:
that.$filter.focus();
return true;
}
return false;
});
},
_setupFilter: function(){
var that = this;
that.$filter.on('keydown keyup keypress paste cut change', function(e){
that.filter(that.$filter.val());
});
},
_setupClickHandler: function () {
var that = this;
that.$list.on('click', 'a', function () {
that.$wrapper.focus();
that.$active.removeClass('active');
that.$active = $(this);
that.focus('first');
});
},
moveUp: function () {
var that = this;
return that.moveLeft();
},
moveDown: function () {
var that = this;
return that.moveRight();
},
moveLeft: function () {
var that = this;
that.$active.removeClass('active');
that.$active = that.$active.prevAll(':visible:first');
that.focus('last');
return false;
},
moveRight: function () {
var that = this;
that.$active.removeClass('active');
that.$active = that.$active.nextAll(':visible:first');
that.focus('first');
return false;
},
filter: function(word){
var that = this;
var regexp = new RegExp(word.toLowerCase());
var found = false;
$.each(that.icons, function(i, $v){
found = regexp.test(i);
if(found && !$v.is(':visible')){
$v.show();
} else if(!found && $v.is(':visible')){
$v.hide();
}
});
}
});
})(jQuery);

Perhaps something like this: http://jsfiddle.net/QFzCY/
var blocksPerRow = 4;
$("body").on("keydown", function(e){
var thisIndex = $(".selected").index();
var newIndex = null;
if(e.keyCode === 38) {
// up
newIndex = thisIndex - blocksPerRow;
}
else if(e.keyCode === 40) {
// down
newIndex = thisIndex + blocksPerRow;
}
if(newIndex !== null) {
$(".test").eq(newIndex).addClass("selected").siblings().removeClass("selected");
}
});
Basically, you set how many items there are in a row and then find the current index and subtract or add that amount to select the next element via the new index.
If you need to know how many blocks per row there are, you could do this:
var offset = null;
var blocksPerRow = 0;
$(".test").each(function(){
if(offset === null) {
offset = $(this).offset().top;
}
else if($(this).offset().top !== offset) {
return false;
}
blocksPerRow++;
});
To deal with your 'edge' cases, you could do:
if(newIndex >= $(".test").length) {
newIndex = $(".test").length - newIndex;
}

moveUp: function () {
var that = this;
var index = $(this).index();
var containerWidth = parseInt( $('.select-icon-list').innerWidth(), 10);
var iconWidth = parseInt( $('.select-icon-list > a').width(), 10);
var noOfCols = Math.floor( containerWidth / iconWidth );
var newIndex = ( (index - noOfCols) < 0 ) ? index : (index - noOfCols);
var elem = $('.select-icon-list > a')[index];
},
Cache what ever remains static.

jquery conflict with js script

welcome all ,
i have a problem with my images slider , it runs successfuly until poll script excuted then it stops , tried to combine both scripts didn't work also tried to use noConflict but in stops both of them .
this is the slider
(function ($) {
$.fn.s3Slider = function (vars) {
var element = this;
var timeOut = (vars.timeOut != undefined) ? vars.timeOut : 4000;
var current = null;
var timeOutFn = null;
var faderStat = true;
var mOver = false;
var items = $("#sliderContent .sliderImage");
var itemsSpan = $("#sliderContent .sliderImage span");
items.each(function (i) {
$(items[i]).mouseover(function () {
mOver = true
});
$(items[i]).mouseout(function () {
mOver = false;
fadeElement(true)
})
});
var fadeElement = function (isMouseOut) {
var thisTimeOut = (isMouseOut) ? (timeOut / 2) : timeOut;
thisTimeOut = (faderStat) ? 10 : thisTimeOut;
if (items.length > 0) {
timeOutFn = setTimeout(makeSlider, thisTimeOut)
} else {
console.log("Poof..")
}
};
var makeSlider = function () {
current = (current != null) ? current : items[(items.length - 1)];
var currNo = jQuery.inArray(current, items) + 1;
currNo = (currNo == items.length) ? 0 : (currNo - 1);
var newMargin = $(element).width() * currNo;
if (faderStat == true) {
if (!mOver) {
$(items[currNo]).fadeIn((timeOut / 6), function () {
if ($(itemsSpan[currNo]).css("bottom") == 0) {
$(itemsSpan[currNo]).slideUp((timeOut / 6), function () {
faderStat = false;
current = items[currNo];
if (!mOver) {
fadeElement(false)
}
})
} else {
$(itemsSpan[currNo]).slideDown((timeOut / 6), function () {
faderStat = false;
current = items[currNo];
if (!mOver) {
fadeElement(false)
}
})
}
})
}
} else {
if (!mOver) {
if ($(itemsSpan[currNo]).css("bottom") == 0) {
$(itemsSpan[currNo]).slideDown((timeOut / 6), function () {
$(items[currNo]).fadeOut((timeOut / 6), function () {
faderStat = true;
current = items[(currNo + 1)];
if (!mOver) {
fadeElement(false)
}
})
})
} else {
$(itemsSpan[currNo]).slideUp((timeOut / 6), function () {
$(items[currNo]).fadeOut((timeOut / 6), function () {
faderStat = true;
current = items[(currNo + 1)];
if (!mOver) {
fadeElement(false)
}
})
})
}
}
}
};
makeSlider()
}
})(jQuery);
and this is the poll script
window.onload = function() {
$(".sidePollCon").load("ar_poll.html", function(r, s, xhr) {
if (s == "error") {
$(".sidePollCon").load("poll.html");
} else {
$(".vote_booroo").html("صوت الان");
$(".viewresults").html("شاهد النتيجة");
$("fieldset p").html("");
$(".results_booroo p").html("");
$(".result_booroo").attr("src", "../images/poll_color.jpg");
}
});
};

One potential problem could be the window.onload assignment. It is very prone to conflict.
Every time you do window.onload = the previous assignemnt will be overridden. See demo here:
The output shows that the first window.onload assignment never gets called, while the jQuery alternative does get called.
jQuery.noConflict does little in this regard. All it does is to prevent override the $ symbol so that another lib can use it.
So if you are also using the window.onload event to invoke the slider, then you have conflict. You can easily solve this problem by using the jquery format:
$(window).load(function() {
...
});
However usually you would tie the event to $(document).load(function(){...}); or in short form: $(function(){...}).
So for your poll that would be:
$(function(){
$(".sidePollCon").load("ar_poll.html", function(r, s, xhr) {
if (s == "error") {
$(".sidePollCon").load("poll.html");
} else {
$(".vote_booroo").html("صوت الان");
$(".viewresults").html("شاهد النتيجة");
$("fieldset p").html("");
$(".results_booroo p").html("");
$(".result_booroo").attr("src", "../images/poll_color.jpg");
}
});
});
Hope that helps.

resolving conflicts in jquery (possibly with another JS library .. like script.aculo.us) can be resolved using noconflict()
http://api.jquery.com/jQuery.noConflict/
$.noConflict();
but make sure that u have no error in your javascript code itself. use firebug and
console.log('') to test your script.