Introduction of regular Expressions (Microsoft)--4. Regular expression syntax

Regular expression syntax
A regular expression is a literal pattern consisting of ordinary characters (such as characters A through Z) and special characters (called metacharacters). This pattern describes one or more strings to be matched when looking for a text body. A regular expression is used as a template to match a character pattern with the string being searched for.
Here are some examples of regular expressions that you might encounter:
Visual Basic VBScript Matching
Scripting Edition
/^[]*$/"^[]*$" matches a blank line.
/d{2}-d{5}/"D{2}-d{5}" verifies that an ID number is made up of a 2-bit word, a
A hyphen and a 5-digit number.

/< (. *) >.*</1>/"< (. *) >.*</1>" matches an HTML tag.
The following table is a complete list of metacharacters and its behavior in the context of regular expressions:
Character description
Marks the next character as a special character, or a literal character, or a later
To a reference, or to a octal escape character. For example, ' n ' matches the character ' n '. ' '
Matches a line feed character. Sequence ' matches ' and ' ("matches" ().
^ matches the start position of the input string. If you set the RegExp object's
Multiline property, ^ also matches the position after ' or '.
$ matches the end position of the input string. If you set the RegExp object's