Chiều rộng kết quả:
px
×
<iframe src="https://viewcode.cunghocweb.com/trycode-full.php?id=74" style="width: 100%; height: 200px; border: 1px solid #ddd; border-radius: 10px; background: #fff"></iframe>
<html> <head> <script type="text/javascript"> function checkNumber() { number = document.getElementById("number").value; switch (number) { case '10': alert("Number = 10"); break; case '20': alert("Number = 20"); break; case '30': alert("Number = 30"); break; default: alert("Not in 10, 20 or 30"); } } </script> </head> <body> Number: <input type="text" id="number" name="number" /> <input type="button" onclick="checkNumber()" value="Submit" /> </body> </html>