Javascript DOM CSS Style marginTop Property get

Introduction

Return the top margin of a <div> element: 

alert(document.getElementById("myDiv").style.marginTop);

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<!DOCTYPE html>
<html>
<head>
<style>
#myDiv {//from  ww  w  . j  a  v  a 2s .  c  o  m
  border: 1px solid #FF0000;
}
</style>
</head>
<body>

<div id="myDiv" style="margin-top:5cm;">This is a div.</div>
<br>
<button type="button" onclick="myFunction()">Return top margin</button>

<p id="demo"></p>
<script>
function myFunction() {
  document.getElementById("demo").innerHTML = document.getElementById("myDiv").style.marginTop;
}
</script>

</body>
</html>



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