Javascript IF语句

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  1. <html>
  2. 	<head>
  3. 		<script language="javascript">
  4.  
  5. 			var secret_password = "jasmine";
  6. 			var entered_password = prompt("please enter password", " ");
  7.  
  8. 			if (entered_password != secret_password)
  9. 			{
  10. 				document.write("incorrect");
  11. 			}
  12. 			else
  13. 			{
  14. 				document.write("welcome");
  15. 			}
  16.  
  17. 		</script>
  18. 	</head>
  19. 	<body>
  20.  
  21. 	</body>
  22. </html>
  23.  
  24.  
  25.  
  26. <html>
  27. 	<head>
  28. 		<script language="javascript">
  29.  
  30. 			var secret_password = "jasmine";
  31. 			var usernmae = "password";
  32. 			var entered_password = prompt("please enter password", " ");
  33. 			var entered_username = prompt("please enter username", " ");
  34.  
  35. 			if ((entered_password == secret_password) && (entered_username == username))
  36. 			{
  37. 				document.write("correct");
  38. 			}
  39. 			else
  40. 			{
  41. 				document.write("try again");
  42. 			}
  43.  
  44. 		</script>
  45. 	</head>
  46. 	<body>
  47.  
  48. 	</body>
  49. </html>
  50.  
  51.  
  52.  
  53. <html>
  54. 	<head>
  55. 		<script language="javascript">
  56.  
  57. 			var admin = admin
  58. 			var developer = "mike";
  59. 			var user = "user";
  60.  
  61. 			var entered_password = prompt("please enter password", " ");
  62.  
  63. 			switch (entered_password)
  64. 			{
  65. 				case "admin": alert("you are admin"); break
  66. 				case "mike": alert("you are a developer"); break
  67. 				case "user": alert("you are a user"); break
  68. 				default: alert("password Incorrect!!"); break
  69. 			}
  70.  
  71. 		</script>
  72. 	</head>
  73. 	<body>
  74.  
  75. 	</body>
  76. </html>

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