Put following code in your head tag
<script type="text/javascript">
$(document).ready(function () {
$("#form1").append("<div style='width:100px;height:100px;background-color:red'>hello</div>").append("<table style='width:300px;height:100px;border: 2px solid blue'><tbody><tr><td style='border: 2px solid Red'>Row 1 Cell 1</td><td style='border: 2px solid Red'>Row 1 Cell 2</td></tr><tr><td style='border: 2px solid Red'>Row 2 Cell 1</td><td style='border: 2px solid Red'>Row 2 Cell 2</td></tr></tbody></table>")
});
</script>
Remember i am using defualt form id as
Form1 so replace it what ever you are having.
Do not forget to add jquery file
Hope This Helps!!!