String object

`String` object in JScript

Conversion to HTML tags
anchor	Creates an HTML anchor that is used as a hypertext target.
big	Causes a string to be displayed in a big font as if it were in a BIG tag.
blink	Causes a string to blink as if it were in a BLINK tag.
bold	Causes a string to be displayed as if it were in a B tag.
fixed	Causes a string to be displayed in fixed-pitch font as if it were in a TT tag.
fontcolor	Causes a string to be displayed in the specified color as if it were in a tag.
fontsize	Causes a string to be displayed in the specified font size as if it were in a tag.
italics	Causes a string to be italic, as if it were in an I tag.
small	Causes a string to be displayed in a small font, as if it were in a SMALL tag.
link	Creates an HTML hypertext link that requests another URL.
strike	Causes a string to be displayed as struck-out text, as if it were in a STRIKE tag.
sub	Causes a string to be displayed as a subscript, as if it were in a SUB tag.
sup	Causes a string to be displayed as a superscript, as if it were in a SUP tag.
String and Substrings
charAt	Returns the character at the specified index.
charCodeAt	Returns a number indicating the ISO-Latin-1 codeset value of the character at the given index.
concat	Combines the text of two strings and returns a new string.
fromCharCode	Returns a string from the specified sequence of numbers that are ISO-Latin-1 codeset values.
indexOf	Returns the index within the calling String object of the first occurrence of the specified value.
lastIndexOf	Returns the index within the calling String object of the last occurrence of the specified value.
match	Used to match a regular expression against a string.
replace	Used to find a match between a regular expression and a string, and to replace the matched substring with a new substring.
search	Executes the search for a match between a regular expression and a specified string.
slice	Extracts a section of a string and returns a new string.
split	Splits a String object into an array of strings by separating the string into substrings.
substr	Returns the characters in a string beginning at the specified location through the specified number of characters.
substring	Returns the characters in a string between two indexes into the string.
toLowerCase	Returns the calling string value converted to lowercase.
toUpperCase	Returns the calling string value converted to uppercase.
valueOf	Returns the primitive value of the specified object.

Examples:

To split a string into an array of its elements, we can use method split(). This method takes up to two arguments. The first argument (optional) is a string containing a separator or a regular expression that separates the elements. If this argument is omitted, the method returns a single-element array containing the entire string. The second argument is an integer value used to limit the number of elements returned in the array. For example, to get an array containing all words of a sentence we can do this:
```
var sentence = "This is a simple sentence to test the split method.";
var words = sentence.split(/\s+|\./);
for(i=0;i<words.length;i++)
  WScript.Echo(words[i]);
```
To retrieve a character from a particular position of a string, we can use method charAt. This method takes only one argument - the index of the position. Remember that the very first element of a string has index 0. The following example prints the string character by character:
```
var word = "JScript";
for(i=0;i<word.length;i++)
  WScript.Echo(word.charAt(i));
```
To find a substring or substrings of a string that match a regular expression, we can use the method match(). This method takes only one argument - the regular expression to match and returns an array of substrings matching the expression. Please note that by default this method terminates once the first matching substring is found. To find all matching substrings, use modifier g. The following example is looking for all phone numbers in a string:
```
var address = "home: 123-4556 office: 987-2322 cell: 233-4566 fax: 123-4566";
var phones = address.match(/\d{3}-\d{4}/g);
for(i=0;i<phones.length;i++)
  WScript.Echo(phones[i]);
```
To replace the part of a string that matches a regular expression with another text, we can use method replace(). This method takes two arguments: the regular expression to match and a text to replace. The following example changes all digits but the last 4 in a credit card number with asterisks:
```
var cardnum = "1234-5678-9012-1213";
var secured = cardnum.replace(/\d{4}-/g, "****-");
WScript.Echo(cardnum + " becomes " + secured);
```
Please note two things in this example:
1. This method doesn't change the original string. It returns the new string.
2. By default this method stops after the first replacement. To replace all matches of the regular expression, we need to use modifier g.
To convert string into lower or upper case, we can use methods toLowerCase() and toUpperCase(). These methods do not need any arguments and they don't change the original string. They both return the new converted string. To actually change the original string, we have to manually assign it the new value:
```
var str = "This is a string containing lower and UPPER case characters.";
str = str.toLowerCase();
```

References:

String object

String object in JScript

References:

`String` object in JScript