Tryit Editor v2.7

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
    height: 250px;
    width: 400px;
    padding: 10px;
    margin: 15px;
    border-left: 10px solid red;
    background-color: lightblue;
    direction: rtl;
    overflow: scroll;
}
</style>

<script>
var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");
hm.src = "//hm.baidu.com/hm.js?73c27e26f610eb3c9f3feb0c75b03925";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script>
</head>
<body>

<p>Click the button to get the width of the div's left border, in pixels.</p>

<button onclick="myFunction()">Try it</button>

<div id="myDIV">
  The text direction of this div is right-to-left.<br>
  And it has a scrollbar!
  <p id="demo"></p>
</div>

<script>
function myFunction() {
    var left = document.getElementById("myDIV").clientLeft;
    document.getElementById("demo").innerHTML = "Border left width: " + left + "px";
}
</script>

</body>
</html>