<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
div{
border: 15px solid transparent;
padding: 15px;
margin: 15px;
border-image-source: url(border.png);
border-image-repeat: repeat;
border-image-slice: 30;
}
</style>
</head>
<body>
<h1>CSS border-image-slice Property</h1>
<div>
This is div container.
</div>
<button onclick="myFunction()">Click Me</button>
<script>
var x = document.getElementsByTagName("div")[0];
function myFunction(){
x.style.borderImageSlice = "50";
}
</script> </body>
</html>