Javascript

• Rhino - A Javascript implementation in Java
• Javascript Drag and Drop
• DOM
• Javascript Arrays|Arrays

• Javascript Strings|Strings

  Strings

  s.substring(start,end) s.split(delimiter)

Arrays

Control Flow

for in loops

for (variable in object){ // do something ( can use object[variable] for value ) }

For example, to show all properties of the current document for (p in document) { alert(p+” = “+document[p]+“\n”); }

Useful Functions

Type checking

isNumber(val)

Timeouts

Events can be set to make a function run after a given number of milliseconds: setTimeout(“functionName()”, 100); To get an even to repeat, put this call inside the function itself and call it from body.onLoad

Events

• onAbort - image
• onBlur - select, text, text area
• onChange - select, text, textarea
• onClick - button, checkbox, radio, link, reset, submit, area
• onError - image
• onFocus - select, text, testarea
• onLoad - windows, image
• onMouseOver - link, area
• onMouseOut - link, area
• onSelect - text, textarea
• onSubmit - form
• onUnload - window

Event handlers can also be defined by naming an event handler. For example

document.onclick = clickHandler function clickHandler() { alert(“Click handled”); }

Note: The event handler when assigned should not be followed by parentheses

Debugging

http://gleepglop.com/javascripts/logger/

Examples

Set as homepage

This probably only works in Internet Explorer Make this my homepage

http://www.javascripttoolbox.com/ - with a fantastic javascript calendar. Cheers Matt.

http://prototype.conio.net/

Andrew McDonough is a consultant CTO and software developer, currently based between Berlin and London.

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