MsgBox Function
See Also
InputBox Function
Requirements
Version 1
Displays a message in a dialog box, waits for the user to click a button, and returns a value indicating which button the user clicked.
MsgBox(prompt[, buttons][, title][, helpfile, context])
Arguments
prompt
String expression displayed as the message in the dialog box. The maximum length of prompt is approximately 1024 characters, depending on the width of the characters used. If prompt consists of more than one line, you can separate the lines using a carriage return character (Chr(13)), a linefeed character (Chr(10)), or carriage return–linefeed character combination (Chr(13) & Chr(10)) between each line.
buttons
Numeric expression that is the sum of values specifying the number and type of buttons to display, the icon style to use, the identity of the default button, and the modality of the message box. See Settings section for values. If omitted, the default value for buttons is 0.
title
String expression displayed in the title bar of the dialog box. If you omit title, the application name is placed in the title bar.
helpfile
String expression that identifies the Help file to use to provide context-sensitive Help for the dialog box. If helpfile is provided, context must also be provided. Not available on 16-bit platforms.
context
Numeric expression that identifies the Help context number assigned by the Help author to the appropriate Help topic. If context is provided, helpfile must also be provided. Not available on 16-bit platforms.
Settings
The buttons argument settings are:
Constant Value Description
vbOKOnly 0 Display OK button only.
vbOKCancel 1 Display OK and Cancel buttons.
vbAbortRetryIgnore 2 Display Abort, Retry, and Ignore buttons.
vbYesNoCancel 3 Display Yes, No, and Cancel buttons.
vbYesNo 4 Display Yes and No buttons.
vbRetryCancel 5 Display Retry and Cancel buttons.
vbCritical 16 Display Critical Message icon.
vbQuestion 32 Display Warning Query icon.
vbExclamation 48 Display Warning Message icon.
vbInformation 64 Display Information Message icon.
vbDefaultButton1 0 First button is default.
vbDefaultButton2 256 Second button is default.
vbDefaultButton3 512 Third button is default.
vbDefaultButton4 768 Fourth button is default.
vbApplicationModal 0 Application modal; the user must respond to the message box before continuing work in the current application.
vbSystemModal 4096 System modal; all applications are suspended until the user responds to the message box.
The first group of values (0–5) describes the number and type of buttons displayed in the dialog box; the second group (16, 32, 48, 64) describes the icon style; the third group (0, 256, 512, 768) determines which button is the default; and the fourth group (0, 4096) determines the modality of the message box. When adding numbers to create a final value for the argument buttons, use only one number from each group.
Return Values
The MsgBox function has the following return values:
Constant Value Button
vbOK 1 OK
vbCancel 2 Cancel
vbAbort 3 Abort
vbRetry 4 Retry
vbIgnore 5 Ignore
vbYes 6 Yes
vbNo 7 No
Remarks
When both helpfile and context are provided, the user can press F1 to view the Help topic corresponding to the context.
If the dialog box displays a Cancel button, pressing the ESC key has the same effect as clicking Cancel. If the dialog box contains a Help button, context-sensitive Help is provided for the dialog box. However, no value is returned until one of the other buttons is clicked.
When the MsgBox function is used with Microsoft Internet Explorer, the title of any dialog presented always contains "VBScript:" to differentiate it from standard system dialogs.
The following example uses the MsgBox function to display a message box and return a value describing which button was clicked:
Dim MyVar
MyVar = MsgBox ("Hello World!", 65, "MsgBox Example")
' MyVar contains either 1 or 2, depending on which button is clicked.作者: hades 时间: 2006-9-26 14:34 标题: Jscript---window.alert(""); window.confirm(""); JScript
Using Message Boxes
Using alert, prompt, and confirm
Use alert, confirm, and prompt message boxes to obtain input from your user. The boxes are methods of the interface window object. Because the window object is at the top of the object hierarchy, you do not actually have to use the full name (for example, "window.alert()") of any of these message boxes, but it is a good idea to do so, because it helps you remember to which object they belong.
Alert Message Box
The alert method has one argument, the string of text you want to display to the user. The string is not HTML. The message box provides an OK button so the user can close it and is modal, that is, the user must close the message box before continuing.
window.alert("Welcome! Press OK to continue.");
Confirm Message Box
The confirm message box lets you ask the user a "yes-or-no" question, and gives the user the option of clicking either an OK button or a Cancel button. The confirm method returns either true or false. This message box is also modal: the user must respond to it (click a button), and thereby close it, before proceeding.
var truthBeTold = window.confirm("Click OK to continue. Click Cancel to stop.");
if (truthBeTold) {
window.alert("Welcome to our Web page!");
} else window.alert("Bye for now!");
Prompt Message Box
The prompt message box provides a text field in which the user can type an answer in response to your prompt. This box has an OK button and a Cancel button. If you provide a second string argument, the prompt message box displays that second string in the text field, as the default response. Otherwise, the default text is "<undefined>".
Like the alert( ) and confirm( ) methods, prompt displays a modal message box. The user must close it before continuing.
var theResponse = window.prompt("Welcome?","Enter your name here.");作者: hades 时间: 2006-9-26 14:37
具体 查看 WR 帮助吧。。作者: lishazhao 时间: 2006-9-26 15:30 标题: 谢谢了 哦。我再查查吧