getElementById () method element with the specified ID

"intro">hello world!</p><script>x =document.getelementbyid ("intro");d ocument.write ("<p > Text from intro paragraph:""</p>"); </script></body>
10. cat connection file or standard input and print. This command is often used to display the contents of a file,
Or connect several files together to display
Or read the content from the standard input and display it, often in conjunction with the redirect symbol

11. Ni command calculates the file line number in the Linux system

12, more can view the contents of the file by page

13. Do not load the entire file after viewing the file

14. Head shows the beginning of the file to the standard output

15, used to display the end of the specified file, do not specify the file, as input information for processing. Common view log files.


getElementById () method element with the specified ID