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<!DOCTYPE html>
<html>
<head>
<style>
#DIV1 {
  height: 200px;
  width: 200px;
  margin: auto;
  border: 1px solid black;
  position: relative;
}
#DIV2 {
  width: 150px;
  height: 150px;
  border: 1px solid black;
  background-color: coral;
  rotate: 0deg;
}
#DIV2original {
  position: absolute;
  z-index: -1;
  opacity: 0.5;
  width: 150px;
  height: 150px;
  border: 1px dashed grey;
  background-color: lightgrey;
}
</style>
</head>
<body>
<h1>Change rotate property with JavaScript</h1>
<p>Click the "Try it" button to set new rotate property angle on z-axis:</p>
<p><b>Note: </b>The grey DIV element indicates where the DIV2 element would be without the change in rotate property. Negative angle value roates element counter-clockwise.</p>
<button onclick="myFunction()">Try it</button>
<div id="DIV1">DIV1