<!DOCTYPE html>
<html>
<body>
<object id="myObject" width="250" height="200" data="helloworld.swf" style="border:1px solid black"></object>
<p>Click the button to change the height and width of the object element to 500px.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("myObject").height = "500";
document.getElementById("myObject").width = "500";
}
</script>
</body>
</html>