Develop Reference

Javascript for loop innerhtml doesn't work

class GenerateArray {
constructor() {
this.arrayCode = document.getElementById('code');
this.BaseCode = document.getElementById('preCode');
this.startCode = document.getElementById('startC');
this.endCode = document.getElementById('endC');
this.question = "";
this.prefix = "";
this.description = "";
this.answer = "";
this.id = "";
this.Name = "";
this.answerDIV = "";
this.count = 0;
}
generateQuestionPart() {
this.question = document.createElement('input');
this.question.setAttribute('type', 'text');
this.question.id = 'question' + this.count;
this.question.className = 'question';
this.question.placeholder = 'What is the question?'
this.prefix = document.createElement('input');
this.prefix.setAttribute('type', 'text');
this.prefix.className = 'prefix';
this.prefix.id = 'prefix' + this.count;
this.prefix.placeholder = 'The prefix of the question that belongs to the link'
this.description = document.createElement('input');
this.description.setAttribute('type', 'text');
this.description.id = 'description' + this.count;
this.description.className = 'description';
this.description.placeholder = 'Add the description that is going to be in the info pop up';
this.answerDIV = document.createElement('div');
this.answerDIV.className = 'answerDIV' + this.count;
this.answerDIV.id = 'AnswerDivId';
this.answer = document.createElement('button');
this.answer.setAttribute('type', 'button');
this.answer.id = 'answer';
this.answer.className = 'answerN' + this.count;
this.answer.innerHTML = 'Add Answer';
this.answer.onclick = function (e) {
for (let i = 0; i < NewArray.count; i++) {
if (e.target.className.endsWith(i)) {
NewArray.id = document.createElement('input');
NewArray.id.setAttribute('type', 'text');
NewArray.id.id = 'id' + i;
NewArray.id.classList.add('id');
NewArray.id.placeholder = 'Add the ID of the answer';
NewArray.Name = document.createElement('input');
NewArray.Name.setAttribute('type', 'text');
NewArray.Name.id = 'Name' + i;
NewArray.Name.className = 'name';
NewArray.Name.placeholder = 'Add the text that is on the answer button';
// console.log(e.target.className);
document.getElementsByClassName('answerDIV' + i)[0].appendChild(NewArray.id);
document.getElementsByClassName('answerDIV' + i)[0].appendChild(NewArray.Name);
}
}
}
document.getElementsByClassName('create')[0].appendChild(this.question);
document.getElementsByClassName('create')[0].appendChild(this.prefix);
document.getElementsByClassName('create')[0].appendChild(this.description);
document.getElementsByClassName('create')[0].appendChild(this.answerDIV);
document.getElementsByClassName('create')[0].appendChild(this.answer);
this.count++;
// console.log(NewArray.answer.length)
}
writeArray() {
let basis = document.createElement('p');
basis.innerHTML =
" class QuizPart {\n" +
" constructor(questionText, chosenAnswer, prefix, questionDescription) {\n" +
" this.questionText = questionText;\n" +
" this.chosenAnswer = chosenAnswer;\n" +
" this.prefix = prefix;\n" +
" this.questionDescription = questionDescription;\n" +
" }\n" +
" }\n" +
"\n" +
" class ChosenAnswer {\n" +
" constructor(id, name) {\n" +
" this.id = id;\n" +
" this.name = name;\n" +
" }\n" +
" }";
this.BaseCode.appendChild(basis);
let startC = document.createElement('p');
startC.innerHTML = "let Quiz = [";
for (let i = 0; i < this.count; i++) {
let code = document.createElement('p');
let output = "new QuizPart('" + document.getElementById('question' + i).value + "', [";
let answers = document.querySelectorAll("input#Name" + i)
console.log(answers.length);
for (let y = 0; y < answers.length; y++) {
output += "new ChosenAnswer('" + document.getElementById('id' + i).value + "', '" + document.getElementById('Name' + i).value + "'),"
}
output += "], '" + document.getElementById('prefix' + i).value + "',";
output += "'" + document.getElementById('description' + i).value + "',";
code.innerHTML = output;
this.arrayCode.appendChild(code);
}
let endC = document.createElement('p');
endC.innerHTML = "]"
this.startCode.appendChild(startC);
this.endCode.appendChild(endC);
// console.log(this.count.length);
}
}
NewArray = new GenerateArray();
NewArray.generateQuestionPart();
body {
margin: 0;
padding: 0;
}
.container{
height: 1000px;
width: 800px;
position: relative;
margin-top: 5px;
left: 50%;
-ms-transform: translate(-50%, 5%);
transform: translate(-50%, 5%);
}
.QPB{
width: 50px;
height: 50px;
margin-bottom: 10px;
background-color: orange;
font-size: 40px;
}
.question{
width: 100%;
height: 20px;
margin-bottom: 10px;
}
#answer{
width: 100px;
height: 35px;
margin-bottom: 50px;
}
.prefix{
width: 100%;
height: 20px;
margin-bottom: 10px;
}
.description{
width: 100%;
height: 20px;
margin-bottom: 10px;
}
.id{
position: relative;
width: 90%;
height: 20px;
margin-bottom: 10px;
margin-left: 10%;
}
.name{
position: relative;
width: 90%;
height: 20px;
margin-bottom: 20px;
margin-left: 10%;
}
.CreateArray{
width: 100px;
height: 35px;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="./style.css">
<title>Hoi</title>
</head>
<body>
<div class="container">
<div class="create">
<button id="QuestionPartBtn" class="QPB" type="button" onclick="NewArray.generateQuestionPart()">+</button>
</div>
<div class="result">
<button id="CreateArray" class="CreateArray" type="button" onclick="NewArray.writeArray()">Create Array</button>
</div>
<div class="preCode" id="preCode"></div>
<div class="startC" id="startC"></div>
<div class="code" id="code"></div>
<div class="endC" id="endC"></div>
</div>
I created this system that makes an array with information that a user fills in in input fields.
The input fields are dynamically generated, so I use a for loop to show them all in an innerHTML that eventually creates the array.
My code:
this.answerDIV = document.createElement('div');
this.answerDIV.className = 'answerDIV' + this.count;
this.answerDIV.id = 'AnswerDivId';
this.answer = document.createElement('button');
this.answer.setAttribute('type', 'button');
this.answer.id = 'answer';
this.answer.className = 'answerN' + this.count;
this.answer.innerHTML = 'Add Answer';
this.answer.onclick = function (e) {
for (let i = 0; i < NewArray.count; i++) {
if (e.target.className.endsWith(i)) {
NewArray.id = document.createElement('input');
NewArray.id.setAttribute('type', 'text');
NewArray.id.id = 'id' + i;
NewArray.id.classList.add('id');
NewArray.id.placeholder = 'Add the ID of the answer';
NewArray.Name = document.createElement('input');
NewArray.Name.setAttribute('type', 'text');
NewArray.Name.id = 'Name' + i;
NewArray.Name.className = 'name';
NewArray.Name.placeholder = 'Add the text that is on the answer button';
// console.log(e.target.className);
document.getElementsByClassName('answerDIV' + i)[0].appendChild(NewArray.id);
document.getElementsByClassName('answerDIV' + i)[0].appendChild(NewArray.Name);
}
}
}
For loop:
for (let i = 0; i < this.count; i++) {
let code = document.createElement('p');
let output = "new QuizPart('" + document.getElementById('question' + i).value + "', [";
let answers = document.querySelectorAll("input#Name" + i)
console.log(answers.length);
for (let y = 0; y < answers.length; y++) {
output += "new ChosenAnswer('" + document.getElementById('id' + i).value + "', '" + document.getElementById('Name' + i).value + "'),"
}
output += "], '" + document.getElementById('prefix' + i).value + "',";
output += "'" + document.getElementById('description' + i).value + "',";
code.innerHTML = output;
this.arrayCode.appendChild(code);
}
The problem is with the second loop. Whenever I create 3 input fields for one question and I generate the innerHTML code it does show me all 3, except that they are all the first input field and the second and third aren't used as seen in the following screenshot:The problem
if i change i to y: Problem 2
(My FiddleJS link):https://jsfiddle.net/thijsl0705/1s98gumk/1/

I entered a,b,c then add answer, d,e then hit the plus sign and add f,g,h,i,j then create array. then hit the plus sign and add 1,2,3,4,5 and create the array and get:
let Quiz = [
let Quiz = [
new QuizPart('a', [new ChosenAnswer('d', 'e'),], 'b','c',
new QuizPart('f', [new ChosenAnswer('i', 'j'),], 'g','h',
new QuizPart('a', [new ChosenAnswer('d', 'e'),], 'b','c',
new QuizPart('f', [new ChosenAnswer('i', 'j'),], 'g','h',
new QuizPart('1', [new ChosenAnswer('4', '5'),], '2','3',
]
]
what exactly is the problem? what do you want to do? Looks like you might be missing a closing ) for each new QuizPart

Organizing buttons in div using only JavaScript

I need help with organizing this gallery to look like this:
I tried everything I know with positions (absolute and relative), bottoms, margins... but I can't seem to organize it properly.
This popup div needs to occupy 80% of page height and 80% of the page width, and images shouldn't break out of div.
I am not allowed to change HTML or to add CSS. Everything needs to be written inside the JS file.
Here is my code:
$(document).ready(function() {
var images = $('div[title ="London gallery"]').children('img').map(function() {
return $(this).attr('src')
}).get();
var description = $('div[title ="London gallery"]').children('p').map(function() {
return $(this).text();
}).get();
$('div[title ="London gallery"]').hide();
var gallery_lndn = document.createElement('button');
gallery_lndn.id = 'btn_London';
gallery_lndn.innerHTML = 'Look at the galery!';
document.body.appendChild(gallery_lndn);
document.getElementById('btn_London').onclick = function() {
show_pictures(images, description);
}
function show_pictures(images, description) {
function popUp() {
var index = 0;
var popup = document.createElement('div');
popup.className = 'popup';
popup.id = 'div_popup';
popup.style.background = "#2F4F4F";
popup.style.position = "absolute";
popup.style.top = "0px";
popup.style.left = "0px";
popup.style.right = "0px";
popup.style.margin = "100px auto";
popup.style.height = "80%";
popup.style.width = "80%";
var cancelButton = document.createElement('button');
cancelButton.innerHTML = 'x';
cancelButton.id = 'btn_cancelButton';
cancelButton.style.background = "red";
cancelButton.style.border = "none";
cancelButton.style.display = "inline-block";
cancelButton.style.fontSize = "16px";
cancelButton.style.padding = "15px 20px";
cancelButton.style.float = "right";
cancelButton.style.top = "0";
cancelButton.onclick = function(e) {
popup.parentNode.removeChild(popup)
};
var previousButton = document.createElement('button');
previousButton.innerHTML = '<<';
previousButton.style.background = "#32CD32";
previousButton.style.border = "none";
previousButton.style.display = "inline-block";
previousButton.style.fontSize = "16px";
previousButton.style.padding = "15px 32px";
previousButton.style.position = "absolute";
previousButton.style.float = "left";
previousButton.style.bottom = "0";
previousButton.onclick = function() {
index = (index == 0) ? images.length - 1 : index - 1;
console.log(index);
updateImage();
}
var nextButton = document.createElement('button');
nextButton.innerHTML = '>>';
nextButton.style.background = "#32CD32";
nextButton.style.background = "#32CD32";
nextButton.style.border = "none";
nextButton.style.display = "inline-block";
nextButton.style.fontSize = "16px";
nextButton.style.padding = "15px 32px";
//nextButton.style.position = "absolute";
nextButton.style.float = "right";
nextButton.style.bottom = "0";
nextButton.onclick = function() {
index = (index == images.length - 1) ? 0 : index + 1;
console.log(index);
updateImage();
}
function updateImage() {
var img = new Image();
img.src = images[index];
img.style.margin = "auto";
img.style.position = "relative";
img.style.display = "block";
console.log(img);
$("#div_popup").html("");
if (index == 0) {
previousButton.style.background = "#A9A9A9";
//previousButton.disabled = "true";
} else if (index == images.length - 1) {
nextButton.style.background = "#A9A9A9";
//nextButton.disabled = "true";
} else {
//nextButton.disabled = "false";
//previousButton.disabled = "false";
previousButton.style.background = "#32CD32";
nextButton.style.background = "#32CD32";
}
popup.appendChild(previousButton);
popup.appendChild(nextButton);
popup.appendChild(cancelButton);
var message = document.createElement('span');
//message.style.position = "absolute";
message.style.bottom = "0";
message.innerHTML = "Picture " + (index + 1) + "/" + images.length + "<br>" + description[index];
img.onload = function() {
popup.appendChild(message);
popup.appendChild(img);
document.body.appendChild(popup);
};
}
updateImage();
}
popUp();
}
});
<!DOCTYPE html>
<html>
<head>
<meta charset="utf8">
<title>Document</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.js"></script>
<script src="gallery.js"></script>
</head>
<body>
<h1>London</h1>
<div class="gallery" title="London gallery">
<img src="https://cdn.londonandpartners.com/visit/general-london/areas/river/76709-640x360-houses-of-parliament-and-london-eye-on-thames-from-above-640.jpg">
<p data-target="https://cdn.londonandpartners.com/visit/general-london/areas/river/76709-640x360-houses-of-parliament-and-london-eye-on-thames-from-above-640.jpg">
Description 1.
</p>
<img src="https://news.itu.int/wp-content/uploads/2018/07/london-min-e1530887248858.jpg">
<p data-target="https://news.itu.int/wp-content/uploads/2018/07/london-min-e1530887248858.jpg">
Description 2.
</p>
</div>
</body>
</html>

You can update the button positions according to the image. Call below method inside the updateImage method just before closing.
function updatePositions(){
// absolute position for all buttons
$('#div_popup > button').css({'position': 'absolute', 'float':'none', 'z-index': 1});
// get image bottom position
let buttonTopPos = ($('#div_popup > img').offset().top + $('#div_popup > img').height()) - $('#div_popup').offset().top + 20;
// get image bottom left position
let buttonLeftPos = 0;
if($('#div_popup').width() > $('#div_popup > img').width()){
buttonLeftPos = ($('#div_popup').width() - $('#div_popup > img').width())/2
}else{
$('#div_popup > img').css({'min-width':'100%', 'max-width':'100%'});
}
// image overflow will be hidden
$('#div_popup').css('overflow', 'hidden');
// Back button position
$('#div_popup > button:nth-child(1)').css({'top': buttonTopPos, 'bottom':'auto', 'left': buttonLeftPos +'px'})
// Next button position
$('#div_popup > button:nth-child(2)').css({'top': buttonTopPos, 'bottom':'auto', 'left': (buttonLeftPos + $('#div_popup > img').width()) - 90})
// cancel button position
$('#div_popup > button:nth-child(3)').css({'top': 0, 'right': 0, left: 'auto'});
// description position
$('#div_popup > span').css({'position': 'absolute','top': buttonTopPos, 'bottom':'auto', 'left': buttonLeftPos + 90, 'width': $('#div_popup > img').width() - 90 - 90, 'text-align': 'center'})
}

Here's a layout that approximates the sample, above. For convenience, this uses JavaScript to add a <style> element to the <head>.
window.onload = () => {
const myCSS =
' body {\n' +
' width:100vw;\n' +
' height:100vh;\n' +
' position:relative\n' +
' }\n' +
' .gallery {\n' +
' background-color: darkblue;\n' +
' width: 80%;\n' +
' height: 80%;\n' +
' position: absolute;\n' +
' top: 10%;\n' +
' left: 10%;\n' +
' }\n' +
' .img-wrapper {\n' +
' background-color: transparent;\n' +
' width: calc(100% - 120px);\n' +
' height: calc(100% - 160px);\n' +
' margin: 60px;\n' +
' overflow-y: hidden;\n' +
' }\n' +
' .img-wrapper img {\n' +
' width: 100%;\n' +
' height: auto;\n' +
' }\n' +
' .btn1 {\n' +
' width: 120px;\n' +
' height: 60px;\n' +
' position: absolute;\n' +
' left: 60px;\n' +
' bottom: 30px;\n' +
' background-color: #999;\n' +
' }\n' +
' .btn2 {\n' +
' width: 120px;\n' +
' height: 60px;\n' +
' position: absolute;\n' +
' right: 60px;\n' +
' bottom: 30px;\n' +
' background-color: #999;\n' +
' }\n' +
' .btn-close {\n' +
' width: 80px;\n' +
' height: 40px;\n' +
' position: absolute;\n' +
' right: 0;\n' +
' top: 0;\n' +
' background-color: #999;\n' +
' }\n' +
' .caption {\n' +
' width: calc(100% - 409px);\n' +
' height: 60px;\n' +
' position: absolute;\n' +
' left: 192px;\n' +
' bottom: 30px;\n' +
' color: white;\n' +
' border: 1px dashed #aaa;\n' +
' text-align: center;\n' +
' padding: 0 12px;\n' +
' overflow: hidden;\n' +
' }\n';
const myStyle = document.createElement('style');
myStyle.id = 'myCSS';
myStyle.innerHTML = myCSS;
document.head.appendChild(myStyle);
}
<body>
<div class="gallery">
<div class="img-wrapper">
<img src="https://cdn.londonandpartners.com/visit/general-london/areas/river/76709-640x360-houses-of-parliament-and-london-eye-on-thames-from-above-640.jpg">
</div>
<div class="btn1">.btn1</div>
<div class="btn2">.btn2</div>
<div class="caption">.caption</div>
<div class="btn-close">.btn-close</div>
</div>
</body>

How to position a circle at a specific point?

I'm currently learning JS and I'm doing this canvas exercise, the task is to "draw" circles on a rectangle by the parameters that the user enters (x and y for positioning the first circle, the radius of the circles and the amount of circles), each circle's x should grow by 1 each time and be positioned accordingly.
The thing is I just can't position the circles no matter what I do! I'm pretty sure it's related to my CSS(which I suck at).
Does anyone know how to position the circle at a specific point?
var container = document.getElementById('container');
var rectangle = document.createElement('div');
rectangle.setAttribute('id', 'rectangle');
container.appendChild(rectangle);
var style = document.createElement('style');
style.innerHTML = "#rectangle {height:300px; width: 400px; background-color: #e1c699; position: relative;}";
document.head.appendChild(style);
var formElement = document.createElement('div');
formElement.setAttribute('id', 'form');
var xInput = createInput("x", "Please enter x");
var yInput = createInput("y", "Please enter y");
var radius = createInput("radius", "Please enter radius");
var numOfCircles = createInput("numOfCirc", "Please enter number of circles");
formElement.appendChild(xInput);
formElement.appendChild(yInput);
formElement.appendChild(radius);
formElement.appendChild(numOfCircles);
var submitBtn = createBtn('submit', 'Submit');
formElement.appendChild(submitBtn);
container.appendChild(formElement);
submitBtn.onclick = function() {
var numOfCirc = document.getElementById('numOfCirc').value;
var raidus = document.getElementById('radius').value;
var x = document.getElementById('x').value;
var y = document.getElementById('y').value;
for (var i = 1; i <= numOfCirc; i++) {
drawCircle(x, y, raidus, i);
x = parseInt(x) + 1;
}
}
function drawCircle(x, y, raidus, id) {
var circle = document.createElement('div');
circle.setAttribute('class', 'circle');
circle.setAttribute('id', id);
var style = document.getElementsByTagName('style')[0];
if (id == 1) {
var circleSize = ".circle {height: " + radius.value + "px; width: " + radius.value + "px; background-color: #555; border-radius: 50%;}";
var position = "#" + id + " {position: absolute; left: " + x + "px; top: " + y + "px;}"
style.insertAdjacentHTML('beforeend', circleSize);
style.insertAdjacentHTML('beforeend', position);
} else {
var position = "#" + id + " {position: absolute; left: " + x + "px; top: " + y + "px;}"
style.insertAdjacentHTML('beforeend', position);
}
rectangle.appendChild(circle);
}
function createInput(id, displayName) {
var input = document.createElement("input");
input.setAttribute("id", id);
input.setAttribute("placeholder", displayName);
return input;
}
function createBtn(id, displayName) {
var btn = document.createElement("button");
btn.setAttribute("id", id);
btn.innerText = displayName;
return btn;
}
<div id="container">
Also, if you have any general propositions for improvements I'd love to hear them!

Function not get called from dynamically created html code

I'am changing the html code from javascript and want to call same function from created "div"s. but it is not called.
As you can see 'html' which is formed after function invoke also has class="screen" but created 'div's doesn't support it.
var i;
var clear = 2;
$("#container").click(function() {
var clickid = $(this).attr('id');
var left = document.getElementById(clickid).offsetLeft;
var top = document.getElementById(clickid).offsetTop;
var height = document.getElementById(clickid).offsetHeight;
var width = document.getElementById(clickid).offsetWidth;
var x = document.getElementById(clickid).value;
orient = prompt("vertical or horizontal ?");
numdiv = prompt("How many divisions should be created ?");
var divsper = [];
var html = "";
for (i = 0; i < numdiv; i++) {
per = prompt("Percentage of " + (i + 1) + "th division ?");
divsper.push(per);
}
if (orient == "vertical") {
for (i = 0; i < numdiv; i++) {
l = Math.floor(left + ((i * divsper[i] * width) / 100));
w = Math.floor((divsper[i] * width) / 100);
html = html + "<div id=" + clickid + " class=\"screen\" style=\"float:left; top:" + (top) + "px; left:" + (l) + "px; height:" + (height - clear) + "px; width:" + (w - clear) + "px; border:1px solid black;\"></div>"
}
document.getElementById(clickid).outerHTML = html;
//document.getElementById(clickid).unwrap();
}
});
* {
padding: 0px;
margin: 0px;
}
body {}
#container {
background-color: pink;
top=0%;
left=0%;
height: 100vh;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" class="screen">
</div>

Replace '$("#container").click(function() {' this line with '$("html").on('click', '[id*=container]', function() {'.
It will work for you.
var i;
var clear = 2;
$("html").on('click', '[id*=container]', function() {
var clickid = $(this).attr('id');
var left = this.offsetLeft;
var top = this.offsetTop;
var height = this.offsetHeight;
var width = this.offsetWidth;
var x = this.value;
orient = prompt("vertical or horizontal ?");
numdiv = prompt("How many divisions should be created ?");
var divsper = [];
var html = "";
for (i = 0; i < numdiv; i++) {
per = prompt("Percentage of " + (i + 1) + "th division ?");
divsper.push(per);
}
if (orient == "vertical") {
for (i = 0; i < numdiv; i++) {
l = Math.floor(left + ((i * divsper[i] * width) / 100));
w = Math.floor((divsper[i] * width) / 100);
html = html + "<div id=" + clickid + (i + 1) + " class=\"screen\" style=\"float:left; top:" + (top) + "px; left:" + (l) + "px; height:" + (height - clear) + "px; width:" + (w - clear) + "px; border:1px solid black;\"></div>"
}
this.outerHTML = html;
//this.unwrap();
}
});
* {
padding: 0px;
margin: 0px;
}
body {}
#container {
background-color: pink;
top=0%;
left=0%;
height: 100vh;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" class="screen">
</div>

Try using $('#container').on('click') instead. Dynamically generated html event handling is slightly different.

Snow until the end of the page

I have a script of snow for the site, I took it from this site. As you can see, the snow does not go the bottom of the page. How can I make it go to the bottom?
Source code:
var SNOW_Time;
var SNOW_dx, SNOW_xp, SNOW_yp;
var SNOW_am, SNOW_stx, SNOW_sty;
var i, SNOW_Browser_Width = $(document).width(), SNOW_Browser_Height = $(document).height();
SNOW_dx = new Array();
SNOW_xp = new Array();
SNOW_yp = new Array();
SNOW_am = new Array();
SNOW_stx = new Array();
SNOW_sty = new Array();
for (i = 0; i < SNOW_no; ++i) {
SNOW_dx[i] = 0;
SNOW_xp[i] = Math.random() * (SNOW_Browser_Width - 50);
SNOW_yp[i] = Math.random() * SNOW_Browser_Height;
SNOW_am[i] = Math.random() * 20;
SNOW_stx[i] = 0.02 + Math.random() / 10;
SNOW_sty[i] = 0.7 + Math.random();
if (i == 0) document.write("<\div id=\"SNOW_flake" + i + "\" style=\"position: absolute; z-index: " + i + "; visibility: visible; top: 15px; left: 15px; width: " + SNOW_Width + "; height: " + SNOW_Height + "; background: url('" + SNOW_Picture + "') no-repeat;\"><\/div>");
else document.write("<\div id=\"SNOW_flake" + i + "\" style=\"position: absolute; z-index: " + i + "; visibility: visible; top: 15px; left: 15px; width: " + SNOW_Width + "; height: " + SNOW_Height + "; background: url('" + SNOW_Picture + "') no-repeat;\"><\/div>");
}
function SNOW_Weather() {
for (i = 0; i < SNOW_no; ++i) {
SNOW_yp[i] += SNOW_sty[i];
if (SNOW_yp[i] > SNOW_Browser_Height) {
SNOW_xp[i] = Math.random() * (SNOW_Browser_Width - SNOW_am[i] - 30);
SNOW_yp[i] = 0;
SNOW_stx[i] = 0.02 + Math.random() / 10;
SNOW_sty[i] = 0.7 + Math.random();
}
SNOW_dx[i] += SNOW_stx[i];
document.getElementById("SNOW_flake" + i).style.top = SNOW_yp[i] + "px";
document.getElementById("SNOW_flake" + i).style.left = SNOW_xp[i] + SNOW_am[i] * Math.sin(SNOW_dx[i]) + "px";
}
SNOW_Time = setTimeout("SNOW_Weather()", 10);
}
SNOW_Weather();

It looks like it's determined by the variable SNOW_Browser_Height. $(document).height() doesn't return the proper height. You could use this instead:
document.body.getClientRects()[0].height