/*
New Perspectives on JavaScript, 2nd Edition
Tutorial 6
Case Problem 2
Author: Kenneth Hitchcock
Date: 6/16/2011
Filename: flibrary.js
Functions List:
getStyle(object, styleName)
Returns the computed style value for a specified styleName applied to
an object.
addEvent(object, evName, fnName, cap)
Assigns an event handers to object where evName is the name of the event,
fnName is the name of the function, and cap is the capture phase.
This function works for both the IE and W3C event models.
removeEvent(object, evName, fnName, cap)
Removes an event handers from object where evName is the name of the event,
fnName is the name of the function, and cap is the capture phase.
This function works for both the IE and W3C event models.
*/
function getStyle(object, styleName) {
if (window.getComputedStyle) {
return document.defaultView.getComputedStyle(object, null).getPropertyValue(styleName);
} else if (object.currentStyle) {
return object.currentStyle[styleName]
}
}
/*
Assigns an event handers to object where evName is the name of the event,
fnName is the name of the function, and cap is the capture phase.
This function works for both the IE and W3C event models.
*/
function addEvent(object, evName, fnName, cap)
{
if (object.attachEvent)
{
object.attachEvent("on" + evName, fnName);
}
else if (object.addEventListener)
{
object.addEventListener(evName, fnName, cap);
}
}
/*
Removes an event handers from object where evName is the name of the event,
fnName is the name of the function, and cap is the capture phase.
This function works for both the IE and W3C event models.
*/
function removeEvent(object, evName, fnName, cap)
{
if (object.detachEvent)
{
object.detachEvent("on" + evName, fnName);
}
else if (object.removeEventListener)
{
object.removeEventListener(evName, fnName, cap);
}
}