You can dynamically change elements in HTML through JavaScript
Add elements to HTML
First, you need to create a tag, then add the corresponding content to the tag, and then add the created tag to the corresponding location.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>Test Document</title> <script type="text/javascript"> function add(){ var element = document.createElement("p"); var node = document.createTextNode("Add new paragraph"); element.appendChild(node); x = document.getElementById("demo"); x.appendChild(element); } </script> </head> <body> <div id="demo"> <p>This is the first paragraph</p> </div> <input type="button" value="button" onclick="add()" /> </body> </html>Delete an element in HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>Test Document</title> <script type="text/javascript"> function deleteE(){ var father = document.getElementById("demo"); var child = document.getElementById("p1"); father.removeChild(child); } </script> </head> <body> <div id="demo"> <p id="p1">This is the first paragraph</p> <p id="p2">This is the second paragraph</p> </div> <input type="button" value="delete" onclick="deleteE()" /> </body> </html>