execCommand

 

mozilla 文档地址：https://developer.mozilla.org/en/Rich-Text_Editing_in_Mozilla#Executing_Commands

 

msdn 文档地址：

 

http://msdn.microsoft.com/en-us/library/aa752577(v=VS.85).aspx

 

http://msdn.microsoft.com/en-us/library/ms533049(v=VS.85).aspx

 

 

mozllia

 

execCommand(String aCommandName, Boolean aShowDefaultUI, String aValueArgument)

 

Arguments

 

String aCommandName：the name of the command

 

Boolean aShowDefaultUI：

whether the default user interface should be shown. This is not implemented in Mozilla.

 

String aValueArgument：some commands (such as insertimage) require an extra value argument (the image's url). Pass an argument of null if no argument is needed.

 

 

msdn

 

 

HRESULT execCommand(

    BSTR cmdID,

    VARIANT_BOOL showUI,

    VARIANT value,

    VARIANT_BOOL *pfRet

);

 

cmdID:[in] BSTR that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.

 

showUI:[in] VARIANT_BOOL that specifies one of the following values.

VARIANT_FALSE:Default. Do not display a user interface. Must be combined with value, if the command requires a value.

VARIANT_TRUE:Display a user interface if the command supports one.

 

value:[in] VARIANT that specifies the string, number, or other value to assign. Possible values and possible VARIANT subtypes depend on the command.

 

pfRet:[out, retval] Pointer to a VARIANT_BOOL that returnsVARIANT_TRUE if the command is successful.

 

 

 

结论：

 

document.execCommand(cmd, false, value);