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How do I create an HTML element that remains on the page and is unaffected by scroll?

I want to create a button that remains on the screen, no matter how much we scroll through the page, like the button is stuck on the display. Is there a way to do this?

absolute
Indicates that the element is absolutely positioned, while other elements are displayed on the web page as if there was absolutely no positioned element. The position of the element is set by the left, top, right, and bottom properties, and the position property of the parent element also affects the position. So, if the parent value of position is set to static or there is no parent, then the coordinates are counted from the edge of the browser window. If the parent's position value is set to fixed, relative or absolute, then the coordinates are counted from the edge of the parent element.
fixed
In its effect, this value is close to absolute, but unlike it, it is tied to the point indicated on the left, top, right, and bottom properties of the screen and does not change its position when scrolling through a web page. The Firefox browser does not display scrollbars at all if the position of the element is fixed and it does not fit entirely into the browser window. Although Opera bars show scrollbars, they do not affect the position of an element.
relative
The position of the element is set relative to its original location. Adding the left, top, right, and bottom properties changes the position of the element and shifts it in one direction or another from the original location.
static
Items are displayed as usual. Using the left, top, right, and bottom properties does not produce any results.
inherit
Inherits the meaning of the parent.
In your case, 'fixed' should work
HTML:
<div class="fix_block">Fixed block</div>
CSS:
.fix_block {
position: fixed;
top: 100px;
left: 30px;
padding: 20px;
border: 1px solid #000;
}

Use position:fixed; on the element. You can then set its location by setting some combination of top, right, bottom, or left.

You can use CSS position property to achieve this, in you case the property you need is position:fixed;
Using this property you can position an element relative to the view port of the browser, and it will always stay in the same place even if the page is scrolled.
So simply put if you have a html element which you want to fix position for just
select it in css and give it position:fixed; and respective left, right, top, bottom values to align it.
HTML
<div class="fixed_div">I am fixed!</div>
CSS
.fixed_div {
position: fixed;
top: 40%;
left: 40%;
padding: 10px;
border: 2px solid red;
}
Hope it helps !

Use the FIXED position
for example: when you have a
<div class:"fixed-btn"> Fixed button </div>
Your Css Should be like:
.fixed-btn{
Position:fixed;
top:100px;
left:0px;
baground:#fff;
padding:5px;
}
Try it..

Positioning a div relative to SCREEN and a COL div

I'm trying do this to long time, but... no luck. The question itself is a little simple.
I need make a div to begin on the left side of screen and ending on the end of a col-xx-x div, which in turn is inside a row div, which in turn is inside a container div.
I've already done it with jQuery, but I'm searching for a way to do that using only HTML and CSS.
I made a image to a better understanding:
(The red square is the div that i want, but it's obvious)
Note: Notice that on my image I used a col-md-6 div, but the col is indeterminate (col-xx-x), I used 6 only to draw.
Here is a fiddle with the code using jQuery:
https://fiddle.jshell.net/b8xcp6j7/

You can adjust .box element width to 200%, set position to relative, left to -100%
.box {
width: 200%;
border: 4px solid red;
padding: 15px;
position:relative;
left:-100%;
}
jsfiddle https://fiddle.jshell.net/6a0uac4y/2/

DIV element cursor behaves inconsistenly

I have a DIV element on a JSP page whose behavior is defined in the following CSS class:
.toolbarRight .shortcut {
background-position: left center;
background-repeat: no-repeat;
width:16px;
height:16px;
margin:0 8px 0 0;
display:inline;
cursor:pointer;
position:relative;
top:6px;
float:left;
border:none;
}
span.toolbarRight .export {
background-image: url('/images/excel.gif');
}
So basically when you hover over it with the mouse it should change into a pointer. The problem is that it only changes into a pointer over the bottom 1/4 of the element, over the top 3/4 it doesn't. Look at pictures below for illustration of the problem.
Pic 1: mouse cursor is over bottom 1/4 of Excel icon (changes into pointer):
Pic 2: mouse cursor is over top 3/4 of Excel icon (does not change into pointer):
Another thing that's strange is that it only happens in my current screen configuration which includes two DHTMLX grids, one in the top half of the screen, the other on the bottom (look at picture below; Excel icon where problem occurs is circled in yellow):
If I have three grids (two horizontal and one vertical) the problem does not occur:
Anybody know what the reason for this is?

Usually when I have this problem, it's because you have another item's padding overlapping the toolbar (or something else). Since the bottom 1/4 is visible, then odds are something above it is overlapping below slightly.

The other answers might be right, but you might also have a float issue here.
You can force parent containers to wrap their floated children by applying overflow: hidden;. Try that out. If it fails, use a clearfix.
Also, I don't know if the width and height of your .toolbarRight .shortcut class will stick because you have it set to display: inline. Try inline-block or just plain old block when you need to apply width and height to things.

It is your
position:relative;
top:6px;
combo - the element sits 6px lower than where you think. The image may be up higher but the container isn't. Move your pointer to the image, not the container for the image

Bottom div with horizontally sliding content

I need an div that will be always at the bottom of the page, margin 172px at the left, and 383px at the right.
This div will have some images and text and left and right buttons. When you hover the mouse at the right button, for example, the content that was "invisible", after reaching the div's width limit, will start appearing from the right, sliding the content for the left.
I tried using position:fixed; bottom:0px, but I couldn't margin the div, and the width of it doesn't change when the screen size changes...
For example, this would be exactly what I want (the black div at the bottom):
If you know any jquery plugin that does what I want or if you know how to do something like this, please help me!

If you're using position: fixed, margin can not be applied. You can specify the left and right attributes though.
position: fixed;
right: 383px;
bottom: 0;
left: 172px;
I know it's not exactly what you're asking for, but you can then set the white-space and overflow attributes on that div to make it so that it will show a horizontal scrollbar.
white-space: nowrap;
overflow: auto;
The user would use the scrollbar on the bottom to move the content of the div. Here's an example: http://jsfiddle.net/rustyjeans/5nv84/
To use jQuery set overflow: hidden and add some functions that adjust the scrollLeft of the div, then add some controls that call those functions when they're hovered. Here's an example: http://jsfiddle.net/rustyjeans/FtSGn/

This shouldn't be too hard to do. You want a containing div that has the dimensions of the viewer. Then, have a div inside that one, with position absolute and dimensions that extend beyond the viewer in width. When the arrows are hovered over use jquery to change the "left" css property of the inner div. Did that help?
EDIT:
The outer div should have "position: relative;" to insure that the inner div is positioned relative to its margins.

Can the content remain centered while the screen size changes?

First, here's is my rough example: http://demindu.com/sandbox/simple.html
What I'm trying to do:
Create a content div: let's say 400px tall and 700px wide, like the example. The content box has a margin of 50px in each direction. The content div should always be centered both vertically and horizontally, regardless of screen resolution. The black background should extend from the centered content area all the way to the right side of the screen, but not to the left.
The only way I can think of possibly doing this is something using window.innerWidth & window.innerHeight in JavaScript, but I don't know enough to know if this is even possible.
The amount of blank space above and below the middle section would need to be:
window.innerHeight - height of the div (in this example: 500px [400px box with two 50px margins]) / 2
The blank space to the left of the black bar would need to be:
window.innerWidth - width of the div (in this example: 800px [700px box with two 50px margins]) / 2
My question to you is: Is this possible in JavaScript? Is this possible somehow with pure CSS?

You can do this entirely in CSS with 4-point absolute positioning. You will need two elements:
The first item spans from the right of the screen to the center where the content is positioned. This element uses absolute positioning for the top, left, and right coordinates of the element (we can leave bottom unspecified as it's taken care of by the height.)
The second item is nested in the former. This item has a fixed width to ensure the content itself remains in the specified width you've chosen. We can also set the height and padding on this object and the parent will inherit it's height. Don't use margins to simulate padding - it can cause cross browser issues when you're just trying to do some positioning tricks as we are here.
So your HTML code would look something like this:
<div id="my_centered_design">
<div id="my_centered_design_content">
<p>This is just some example text.</p>
</div>
</div>
And you're CSS would look like this:
div#my_centered_design {
background: #000;
margin-left: -400px;
margin-top: -250px;
left: 50%;
position: absolute;
right: 0;
top: 50%;
}
div#my_centered_design_content {
background: #333;
height: 400px;
/* I think you actually want padding for
the effect you're trying to accomplish */
padding: 50px;
width: 700px;
}
Essentially this is the same trick as the Joe2Tutorial except we are applying additional positioning rules to adhere the centered element to the right side of the screen.

I think this pure css solution would suit you best: http://www.joe2torials.com/view_tutorial.php?view=37

A very quick google resulted in this piece of code.
this code does not align a div in the middle. what you actually for your own website is that you put the following div css
.main {
width: 140px;background-color: #252525; float: left;margin-top: 25px; }
inside a table that is aligned to be centered. so, basically you're using the table's centering feature to center your left floated div simply as a content. you're not doing anything through div or css for that matter. the piece of css code you offered doesn't not anything about centering a div in the middle.