源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <p id="demo"></p> <script> var x = 5; // Initialize x elem = document.getElementById("demo"); // Find an element elem.innerHTML = "x is " + x + " and y is " + y; // Display x and y var y = 7; // Initialize y </script> </body> </html>
运行结果