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JavaScript is a programming language which is used in millions of web pages worldwide.
This page contains links to some useful JavaScript information and examples.
- Examples of JavaScript in action:
- • dynamic form - creates a form to invoke Google Trends
- • PHP script used with JavaScript to count how often each letter a thru z occurs in the text that you type or paste into a text area.
- Arrays (see also - Strings):
- • arrays
- • concat method - join multiple arrays into one array.
- • join method - merge array elements into one string.
- • length property - contains the arrays's length.
- • multidimensional named arrays
- • multidimensional numbered arrays
- • pop method - remove and return the last element.
- • push method - add element to end of array.
- • reverse method - reverse the order of all elements.
- • shift method - remove and return the first array element.
- • slice method - returns a portion of the array.
- • sort method - sorts the array.
- • splice method - remove or replace array elements.
- • toString method - merge array elements into one string.
- • unShift method - add element to start of array.
- Date object:
- • date and time methods
- DOM (Document Object Model):
- • DOM anchors and links arrays
- • DOM history object
- • DOM images array
- • DOM lastModified property
- • DOM referrer property
- Flow of Control Statements:
- • for loop
- • if statement
- • switch statement
- Functions:
- • local variables - variables that exist only within a function.
- • setTimeout function - run javascript once, after specified delay.
- Input/Output:
- • prompt() method - request that the user input data.
- • write() method
- • writeln() method
- Operators:
- • equality operator ==
- • exclusive or
- • inequality operator !=
- • logical operators
- • math operators
- • questionmark operator ?
- • typeOf operator - find the first number in a character string.
- Strings (see also - Arrays):
- • charAt method - returns character at specified location.
- • indexOf method - search for specified substring.
- • length property - contains the string's length.
- • lastIndexOf method - search for substring, work right to left.
- • parseInt method - search for number within a string.
- • remove blanks from strings - using charAt method in a loop.
- • split method - convert the delimited string into an array.
- • substring method - copy (not cut) a substring from a string.
- • toLowerCase() method - convert string to lower case.
- • toUpperCase() method - convert string to upper case.
- Windows:
- • window.open for pop-ups and pop-unders
- • window properties
- Other topics:
- • background image
- • comments
- • re-directing to another page
- • splitting a script
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