Javascript DOM onscroll Event on window object

Introduction

Slide in an element when the user has scrolled down 350 pixels from the top of the page.

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<!DOCTYPE html>
<html>
<head>
<style>
.slideUp {/*from w  w w .j  a  v  a2  s .co  m*/
  animation-name: slideUp;
  -webkit-animation-name: slideUp;
  animation-duration: 1s;
  -webkit-animation-duration: 1s;
  visibility: visible;
}

@keyframes slideUp {
  0% {
    opacity: 0;
    -webkit-transform: translateY(70%);
  }
  100% {
    opacity: 1;
    -webkit-transform: translateY(0%);
  }
}

@-webkit-keyframes slideUp {
  0% {
    opacity: 0;
    -webkit-transform: translateY(70%);
  }
  100% {
    opacity: 1;
    -webkit-transform: translateY(0%);
  }
}

body {height:1500px;}
.col-1 {float:left}
.col-2 {float:left;padding-left:25px;}
img {width:180px;height:100px;visibility:hidden;}
hr {margin-top:400px;}
</style>
</head>
<body>

<p>Scroll down this page.</p>
<p>When you have scrolled 350px from the top, an image will slide in.</p>

<hr>
<div class="col-1">
  <img id="myImg" src="image1.png" width="304" height="228">
</div>

<div class="col-2">
  Just some text..
</div>

<script>
window.onscroll = function() {myFunction()};

function myFunction() {
  if (document.body.scrollTop > 350 || document.documentElement.scrollTop > 350) {
    document.getElementById("myImg").className = "slideUp";
  }
}
</script>

</body>
</html>



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