execCommand method in javascript

Introduction

if you are going to design a RichTextBox on your own, then go through execCommand method. It will execute a command on the current document or  the selected range in the document.

Examples

You can allow the user to paste the text from the clipboard using ‘Paste’ command in the execCommand method.

var myRange1 = document.body.createTextRange();

   myRange1.moveToElementText(myDiv2);

   myRange1.execCommand('Paste');

After pasting the data, if you want to delete selected data.Then use ‘Delete’ command in the execCommand method

var cRange = document.selection.createRange();

    cRange.execCommand('Delete');

If the pasted data is bulletlist and if your want to indent the data then use ‘Indent’ command , if you want to outdent then use ‘Outdent’ command.

var cRange = document.selection.createRange();

    cRange.execCommand('Indent');

var cRange = document.selection.createRange();

    cRange.execCommand('Outdent');

Conclusion

Reference

Like this lots of commands can be used in the execute command, you can have a look at this post http://msdn.microsoft.com/en-us/library/ms533049(v=VS.85).aspx