Topics:

JavaScript Terms

JavaScript Methods

• alert
• prompt
• confirm
• eval
• parseInt
• open

Flow of control / programming structures

• selection
  if / if-else
• repetition
  for / while

Functions

• declaring
  function mystery(a, b, c) { var secret = "now, "; if (a) secret += a + " "; if (b) secret += b + " "; if (c) secret += c + " "; alert(secret); }
• calling
• parameter passing
  Which of these will pass values to a and c only? Why not?
  1. onclick ="mystery('go', null, 'sea hawks');"
  2. onclick="mystery('go', "", 'sea hawks');"
  3. onclick="mystery('go', '', 'sea hawks');"
  4. onclick="mystery('go', , 'sea hawks');"

Arrays

• initializer lists
• assigning values to
• getting values from
• using in loops

Variables

• global
• local

Math

• round()
• random()
• scale and shift
• operators: +, -, *, %, /

URLs

• relative versus absolute addressing

Tables

• Code to change cell background color if answer is correct

JavaScript Objects / JavaScript Properties

• onBlur  Blurs occur when a select, text or textarea field on a form loses focus. Event handler of select, text, textarea. See EVENT HANDLERS onChange and onFocus.
• onChange  A change event happens when a select, text, or textarea element on a form is modified before losing focus. Event handler of select, text, textarea. See EVENT HANDLERS onBlur, onFocus.
• onClick  Occurs when an object, such as a button or check box, is clicked. Event handler of button, checkbox, radio, link, reset, submit.
• onFocus  A form element receives focus by tabbing to or clicking the input area with the mouse. Selecting within a field results in a select event. Event handler of select, text, textarea. See EVENT HANDLERS onBlur and onChange.
• onLoad  A load event is created when Navigator finishes loading a window or all frames within a <frameset> tag. Event handler of window. See onUnload EVENT HANDLER.
• onMouseOver / onMouseDown / onMouseMove / onMouseUp / onMouseOut  Occurs when the mouse pointer is placed over a link object. To function with the status or defaultStatus properties, the event handler must return true. Event handler of link.
  //assign functions to the mouse event
  document.onmousedown = start;
  document.onmousemove = checkLocation;
  document.onmouseup = stop;
  //sample function definitions
  function start(e) { if (started == 0) { moveEnemies(); startClock(); started = 1; }
                             curX = window.event.x ;
                             curY = window.event.y ;
                             curX2 = eval(curX - 40);
                             curY2 = eval(curY - 40);
                             boxX = eval(curX - 20);
                             boxY = eval(curY - 20);
                             var boxleft = givePosX('box');
                             var boxtop = givePosY('box');
                             if (curX > boxleft && curX2 < boxleft && curY > boxtop && curY2 < boxtop) { moving = 1; setPosX('box', boxX); setPosY('box', boxY); }
  }
  function checkLocation(e){ ...}
  function stop(e){ moving = 0; }
• onSelect  A select event is triggered by selecting some or all of the text in a text or textarea field. Event handler of text, textarea.
• onSubmit  Triggered by the user submitting a form. The event handler must return true to allow the form to be submitted to the server. Conversely, it returns false to block the form's submission. Event handler of form. See submit OBJECT and METHOD.