1 <!DOCTYPE html> 2 <html> 3 <body> 4 5 <span>Hello</span><br> 6 7 <button onclick="cover()">点击这里</button> 8 9 <script> 10 function cover() 11 { 12 document.write("Hello World"); 13 } 14 </script> 15 16 </body> 17 </html>
