View Full Version : Mouseover Image Fade - Help

Sven Treffenstein
04-13-2009, 06:07 AM

I do not understand Javascript enough to be able to write it, only basic edits. I was hoping someone here could help me write/correct this Fader code, so that it's cross-browser compatible. Currently, I know that it works in IE6-7, but not in Firefox or other browsers--haven't tried others yet.

Here is a test page with the code running on an image:

As you can see in IE, I have it fading out to 0%. In FF, it does nothing.

I hope and appreciate any help. Also if willing, a brief summary on how it's fixed, so that I can better understand what has been done. I would like to learn.

Thank you,

04-13-2009, 10:07 AM
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Fade Test</title>

<script type="text/javascript">
// Basic Element Animator (21-February-2009)
// by Vic Phillips http://www.vicsjavascripts.org.uk

// To progressively change the Left, Top, Width, Height or Opacity of an element over a specified period of time.
// With the ability to scale the effect time on secified minimum/maximum values<br />
// and with three types of progression 'sin' and 'cos' and liner.

// **** Application Notes

// **** The HTML Code
// when moving an element the inline or class rule style position of the element should be assigned as
// 'position:relative;' or 'position:absolute;'.
// The element would normally be assigned a unique ID name.

// **** Executing the Effect(Script)
// The effect is executed by an event call to function 'zxcBAnimator('width#',document.getElementById('tst'),10,800,5000,[10,800],'sin');'
// where:
// parameter 0 = the mode(see Note 2). (string)
// parameter 1 = the unique ID name or element object. (string or element object)
// parameter 2 = the start position of the effect. (digits, for opacity minimum 0, maximum 100)
// parameter 3 = the finish position of the effect. (digits, for opacity minimum 0, maximum 100)
// parameter 4 = (optional) period of time between the start and finish of the effect in milliseconds. (digits or defaults to 2000 milliSeconds)
// parameter 5 = (optional) to scale the effect time on a secified minimum/maximum. (array, see Note 5)
// field 0 the minimum. (digits)
// field 1 the maximum. (digits)
// parameter 6 = (optional) the type of progression, 'sin', 'cos' or 'liner'. (string, default = 'liner')
// 'sin' progression starts fast and ends slow.
// 'cos' progression starts slow and ends fast.
// Note 1: The default units(excepting opacity) are 'px'.
// Note 2: Examples modes: 'left', 'top', 'width', 'height', 'opacity.
// For hyphenated modes, the first character after the hyphen must be upper case, all others lower case.
// Note 3: To 'toggle' the effect include '#' in parameter 0.
// The first call will set the toggle parameters.
// Subsequent calls with '#' in parameter 0 and the same start and finish parameters will 'toggle' the effect.
// Note 4: The function may be re-executed with a different set of parameters (start/finish time or period)
// whenever required, say from an onclick/mouseover/out event.
// The period parameter will be retained unless re-specified.
// Note 5: parameter 5 is of particular use when re-calling the effect
// in mid travel to retain an constant rate of progression.
// **** Advanced Applications
// It may be required to access the current value of the effect.
// The element effect is accessible from the element property
// element effect = elementobject[mode.replace(/\W/g,'')+'oop'];
// where mode is parameter 0 of the initial call.
// An array storing the current, start and finish values of the element effect may be accessed
// from the element effect.data as fields 0, 1 and 2 respectively

// **** General
// All variable, function etc. names are prefixed with 'zxc' to minimise conflicts with other JavaScripts.
// These characters may be changed to characters of choice using global find and replace.
// The Functional Code(about 2.06K) is best as an External JavaScript.
// Tested with IE7 and Mozilla FireFox on a PC.

// **** Functional Code - NO NEED to Change

function zxcBAnimator(mde,obj,srt,fin,ms,scale,curve){
if (typeof(obj)=='string'){ obj=document.getElementById(obj); }
if (!obj||(!srt&&!fin)||(srt==fin)) return;
var oop=obj[mde.replace(/\W/g,'')+'oop'];
if (oop){
if (oop.srtfin[0]==srt&&oop.srtfin[1]==fin&&mde.match('#')) oop.update([oop.data[0],(oop.srtfin[0]==oop.data[2])?fin:srt],ms,scale,curve);
else oop.update([srt,fin],ms,scale,curve);
else obj[mde.replace(/\W/g,'')+'oop']=new zxcBAnimatorOOP(mde,obj,srt,fin,ms,scale,curve);

function zxcBAnimatorOOP(mde,obj,srt,fin,ms,scale,curve){

this.srttime=new Date().getTime();

var ms=new Date().getTime()-this.srttime;
if (this.mde!='left'&&this.mde!='top'&&this.data[0]<0) this.data[0]=0;
if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
else zxcOpacity(this.obj,this.data[0]);
if (ms<this.ms) this.to=setTimeout(function(oop){return function(){oop.cng();}}(this),10);
else {
if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
else zxcOpacity(this.obj,this.data[0]);

function zxcOpacity(obj,opc){
if (opc<0||opc>100) return;



<img src="http://www.vicsjavascripts.org.uk/StdImages/One.gif" width="80" height="361" border="0"
style="filter:alpha(opacity=100); -moz-opacity: 1.0; -khtml-opacity: 1.0; opacity: 1.0;"


Sven Treffenstein
04-13-2009, 09:52 PM
Hey Vic,

Wow, thank you so much! I love the code. I could use it for many things.

Excellent work! :D

Thanks again,