object.execCommand - 非主流童话 - liugy

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快速链接

object.execCommand [原创 2006-05-29 19:03:43]

这个东东在在线的可视化编辑器中经常用到。(注意：只是IE支持)

语法

bSuccess = object.execCommand(sCommand [, bUserInterface] [, vValue])；

参数的意义

sCommand：必选参数，字符串型. 这是要执行的方法名. 可以是任意可以在脚本语言里面执行的命令。（命令见附录）

bUserInterface 可选项.布尔型. 默认为false. 不执行用户接口.
为true时，如sCommand 支持用户接口，执行之.

vValue 可选项.可以是字符串，数字或其它值。选什么值，依赖于sCommand。

返值

如果命令执行成功，返回 true，否则false

注意
1、如果页面没有调入完成，请不要使用此方法。
2、bUserInterface和vValue在command运行时也许会被用到

例子

这个例子使用了CreateLink作为execCommand的sCommand参数，允许用户用超级链接替换所选择的文字。

<HTML>
<BODY>
<H1 unselectable="on">创建超连接并重定向 URL</H1>
<script>
function AddLink()
{//Identify selected text
var sText = document.selection.createRange();
if (!sText==""){
    //创建链接
     document.execCommand("CreateLink");
     //用超连接替换所选文字
     if (sText.parentElement().tagName == "A"){
       sText.parentElement().innerText=sText.parentElement().href;
       document.execCommand("ForeColor","false","#FF0033");
     }
}
else{
    alert("请选择蓝色文字!");
}
}
</script>
<P unselectable="on">选择下面的文字，并且单击“添加链接”，输入网址，网址会被替换.</P>
<P style="color=#3366CC">我的最喜欢的网址很值得一看哦!</P>

************************************************************************

附录：可用的sCommand(http://msdn.microsoft.com/workshop/author/dhtml/reference/commandids.asp?frame=true)

2D-Position
Allows absolutely positioned elements to be moved by dragging.
AbsolutePosition
Sets an element's position property to "absolute."
BackColor
Sets or retrieves the background color of the current selection.
BlockDirLTR
Not currently supported.
BlockDirRTL
Not currently supported.
Bold
Toggles the current selection between bold and nonbold.
BrowseMode
Not currently supported.
ClearAuthenticationCache
Clears all authentication credentials from the cache. Applies only to execCommand.
Copy
Copies the current selection to the clipboard.
CreateBookmark
Creates a bookmark anchor or retrieves the name of a bookmark anchor for the current selection or insertion point.
CreateLink
Inserts a hyperlink on the current selection, or displays a dialog box enabling the user to specify a URL to insert as a hyperlink on the current selection.
Cut
Copies the current selection to the clipboard and then deletes it.
Delete
Deletes the current selection.
DirLTR
Not currently supported.
DirRTL
Not currently supported.
EditMode
Not currently supported.
FontName
Sets or retrieves the font for the current selection.
FontSize
Sets or retrieves the font size for the current selection.
ForeColor
Sets or retrieves the foreground (text) color of the current selection.
FormatBlock
Sets the current block format tag.
Indent
Increases the indent of the selected text by one indentation increment.
InlineDirLTR
Not currently supported.
InlineDirRTL
Not currently supported.
InsertButton
Overwrites a button control on the text selection.
InsertFieldset
Overwrites a box on the text selection.
InsertHorizontalRule
Overwrites a horizontal line on the text selection.
InsertIFrame
Overwrites an inline frame on the text selection.
InsertImage
Overwrites an image on the text selection.
InsertInputButton
Overwrites a button control on the text selection.
InsertInputCheckbox
Overwrites a check box control on the text selection.
InsertInputFileUpload
Overwrites a file upload control on the text selection.
InsertInputHidden
Inserts a hidden control on the text selection.
InsertInputImage
Overwrites an image control on the text selection.
InsertInputPassword
Overwrites a password control on the text selection.
InsertInputRadio
Overwrites a radio control on the text selection.
InsertInputReset
Overwrites a reset control on the text selection.
InsertInputSubmit
Overwrites a submit control on the text selection.
InsertInputText
Overwrites a text control on the text selection.
InsertMarquee
Overwrites an empty marquee on the text selection.
InsertOrderedList
Toggles the text selection between an ordered list and a normal format block.
InsertParagraph
Overwrites a line break on the text selection.
InsertSelectDropdown
Overwrites a drop-down selection control on the text selection.
InsertSelectListbox
Overwrites a list box selection control on the text selection.
InsertTextArea
Overwrites a multiline text input control on the text selection.
InsertUnorderedList
Toggles the text selection between an ordered list and a normal format block.
Italic
Toggles the current selection between italic and nonitalic.
JustifyCenter
Centers the format block in which the current selection is located.
JustifyFull
Not currently supported.
JustifyLeft
Left-justifies the format block in which the current selection is located.
JustifyNone
Not currently supported.
JustifyRight
Right-justifies the format block in which the current selection is located.
LiveResize
Causes the MSHTML Editor to update an element's appearance continuously during a resizing or moving operation, rather than updating only at the completion of the move or resize.
MultipleSelection
Allows for the selection of more than one site selectable element at a time when the user holds down the SHIFT or CTRL keys.
Open
Not currently supported.
Outdent
Decreases by one increment the indentation of the format block in which the current selection is located.
OverWrite
Toggles the text-entry mode between insert and overwrite.
Paste
Overwrites the contents of the clipboard on the current selection.
PlayImage
Not currently supported.
Print
Opens the print dialog box so the user can print the current page.
Redo
Not currently supported.
Refresh
Refreshes the current document.
RemoveFormat
Removes the formatting tags from the current selection.
RemoveParaFormat
Not currently supported.
SaveAs
Saves the current Web page to a file.
SelectAll
Selects the entire document.
SizeToControl
Not currently supported.
SizeToControlHeight
Not currently supported.
SizeToControlWidth
Not currently supported.
Stop
Not currently supported.
StopImage
Not currently supported.
StrikeThrough
Not currently supported.
Subscript
Not currently supported.
Superscript
Not currently supported.
UnBookmark
Removes any bookmark from the current selection.
Underline
Toggles the current selection between underlined and not underlined.
Undo
Not currently supported.
Unlink
Removes any hyperlink from the current selection.
Unselect
Clears the current selection.

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