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<html><head><style> #main { border: 15px solid transparent; padding: 15px; border-image: url(border.png); border-image-slice: 30; border-image-width: 20px; border-image-repeat: round;}</style></head><body><h1>Change border-image-source with JavaScript</h1><p id="main">This element uses an image as a border.</p><p>Click the "Try it" button to change the value of the borderImageSource property.</p><button onclick="myFunction()">Try it</button><script>function myFunction() { document.getElementById("main").style.borderImageSource = "url(img_flwr.gif)";}</script><p>Here are the two images used:</p><img src="border.png"><img src="img_flwr.gif" width="224" height="162"></body></html>