Random Background Rotation Script Help [Archive]

illusive817

05-22-2010, 07:30 PM

im currently using this script



<style>
body{
/*Remove below line to make bgimage NOT fixed*/
background-attachment:fixed;
background-repeat: no-repeat;
/*Use center center in place of 300 200 to center bg image*/
background-position: center 0;
}

</style>

<script language="JavaScript1.2">

//Specify background images to slide
var bgslides=new Array()
bgslides[0]="images/backgrounds/Bg1.jpg"
bgslides[1]="images/backgrounds/Bg2.jpg"
bgslides[2]="images/backgrounds/Bg3.jpg"
bgslides[3]="images/backgrounds/Bg4.jpg"
bgslides[4]="images/backgrounds/Bg5.jpg"
bgslides[5]="images/backgrounds/Bg6.jpg"
bgslides[6]="images/backgrounds/Bg7.jpg"
bgslides[7]="images/backgrounds/Bg8.jpg"
bgslides[8]="images/backgrounds/Bg9.jpg"
bgslides[9]="images/backgrounds/Bg10.jpg"
bgslides[10]="images/backgrounds/Bg11.jpg"

//Specify interval between slide (in miliseconds)
var speed=2000

//preload images
var processed=new Array()
for (i=0;i<bgslides.length;i++){
processed[i]=new Image()
processed[i].src=bgslides[i]
}

var inc=-1

function slideback(){
if (inc<bgslides.length-1)

// The final number of the next line must be equal to the number of images present.
inc=Math.floor(Math.random() * 10)

else
inc=0
document.body.background=processed[inc].src
}

if (document.all||document.getElementById)
window.onload=new Function('setInterval("slideback()",speed)')

</script>



to Randomly rotate the background image, but now i want it to only rotate a div tag background , while leaving the body background alone

i have already tried changing the id="slideback" , i removed it from the <body> Tag , and applied it to the div i want to rotate , it still changes the body background.

Also another issue is i need it to preload one picture , instead of waiting on the rotation to load the first image

illusive817

05-22-2010, 07:40 PM

just looking at the code noticed this

// The final number of the next line must be equal to the number of images present.
inc=Math.floor(Math.random() * 10)

else
inc=0
document.body.background=processed[inc].src
}

if (document.all||document.getElementById)
window.onload=new Function('setInterval("slideback()",speed)')

is pointing to the body background , how can i point it to the right place?
its a div tag id="slideback"

vwphillips

05-23-2010, 12:10 PM

<!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" xml:lang="en" lang="en">

<head>
<title></title>


<style>
#D1 {
/*Remove below line to make bgimage NOT fixed*/
width:200px;height:200px;border:solid black 1px;
background-attachment:fixed;
background-repeat: no-repeat;
/*Use center center in place of 300 200 to center bg image*/
}

#D2 {
/*Remove below line to make bgimage NOT fixed*/
width:200px;height:200px;border:solid black 1px;
/*Use center center in place of 300 200 to center bg image*/
}

</style>

<script type="text/javascript" >

//Specify background images to slide
var bgslides=[
"http://www.vicsjavascripts.org.uk/StdImages/One.gif",
"http://www.vicsjavascripts.org.uk/StdImages/Two.gif",
"http://www.vicsjavascripts.org.uk/StdImages/Three.gif",
"http://www.vicsjavascripts.org.uk/StdImages/Four.gif",
];

//preload images
for (var src,i=0;i<bgslides.length;i++){
src=bgslides[i];
bgslides[i]=new Image();
bgslides[i].src=src;
}

function BRChanger(o){
this.obj=document.getElementById(o.ID);
this.ary=o.ImageArray;
this.ms=o.Speed||1000;
this.Rotate();
}

BRChanger.prototype.Rotate=function(){
this.obj.style.backgroundImage='url('+this.ary[Math.floor(Math.random()*(this.ary.length-1))].src+')';
var oop=this;
this.to=setTimeout(function(){ oop.Rotate(); },this.ms);
}

</script>



</head>

<body>
<div id="D1" ></div>
<div id="D2" ></div>
<script type="text/javascript">

new BRChanger({
ID:'D1',
ImageArray:bgslides,
Speed:2000
});

new BRChanger({
ID:'D2',
ImageArray:bgslides,
Speed:1000
});

</script>
</body>

</html>

illusive817

05-23-2010, 02:03 PM

Works great Thanks

illusive817

05-25-2010, 05:53 PM

is there anyway to add in a fade effect or maybe even a scroll effect or something?

vwphillips

05-26-2010, 07:58 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" xml:lang="en" lang="en">

<head>
<title></title>


<style>
#D1 {
/*Remove below line to make bgimage NOT fixed*/
width:200px;height:200px;border:solid black 1px;
/*Use center center in place of 300 200 to center bg image*/
}

#D2 {
/*Remove below line to make bgimage NOT fixed*/
width:200px;height:200px;border:solid black 1px;
/*Use center center in place of 300 200 to center bg image*/
}

</style>

<script type="text/javascript">
// Animate (11-January-2010)
// 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 specified minimum/maximum values
// 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.
//

// **** Initialising the Script.
//
// The script is initialised by assigning an instance of the script to a variable.
// e.g A = new zxcAnimate('left','id1')
// where:
// A = a global variable (variable)
// parameter 0 = the mode(see Note 1). (string)
// parameter 1 = the unique ID name or element object. (string or element object)
// parameter 1 = the initial value. (digits, default = 0)

// **** Executing the Effect
//
// The effect is executed by an event call to function 'A.animate(10,800 ,5000,[10,800]);'
// where:
// A = the global referencing the script instance. (variable)
// parameter 0 = the start value. (digits, for opacity minimum 0, maximum 100)
// parameter 1 = the finish value. (digits, for opacity minimum 0, maximum 100)
// parameter 2 = period of time between the start and finish of the effect in milliseconds. (digits or defaults to previous or 0(on first call) milliSeconds)
// parameter 3 = (optional) to scale the effect time on a specified minimum/maximum. (array, see Note 3)
// field 0 the minimum value. (digits)
// field 1 the maximum value. (digits)
// parameter 3 = (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: Examples modes: 'left', 'top', 'width', 'height', 'opacity.
// Note 2: The default units(excepting opacity) are 'px'.
// For hyphenated modes, the first character after the hyphen must be upper case, all others lower case.
// Note 3: The scale is of particular use when re-calling the effect
// in mid progression to retain an constant rate of progression.
// Note 4: The current effect value is recorded in A.data[0].
// Note 5: A function may be called on completion of the effect by assigning the function
// to the animator intance property .Complete.
// e.g. [instance].Complete=function(){ alert(this.data[0]); };
//

// **** Functional Code(1.58K) - NO NEED to Change

function zxcAnimate(mde,obj,srt){
this.to=null;
this.obj=typeof(obj)=='object'?obj:document.getElementById(obj);
this.mde=mde.replace(/\W/g,'');
this.data=[srt||0];
return this;
}

zxcAnimate.prototype.animate=function(srt,fin,ms,scale,c){
clearTimeout(this.to);
this.time=ms||this.time||0;
this.neg=srt<0||fin<0;
this.data=[srt,srt,fin];
this.mS=this.time*(!scale?1:Math.abs((fin-srt)/(scale[1]-scale[0])));
this.c=typeof(c)=='string'?c.charAt(0).toLowerCase():this.c?this.c:'';
this.inc=Math.PI/(2*this.mS);
this.srttime=new Date().getTime();
this.cng();
}

zxcAnimate.prototype.cng=function(){
var oop=this,ms=new Date().getTime()-this.srttime;
this.data[0]=(this.c=='s')?(this.data[2]-this.data[1])*Math.sin(this.inc*ms)+this.data[1]:(this.c=='c')?this.data[2]-(this.data[2]-this.data[1])*Math.cos(this.inc*ms):(this.data[2]-this.data[1])/this.mS*ms+this.data[1];
this.apply();
if (ms<this.mS) this.to=setTimeout(function(){oop.cng()},10);
else {
this.data[0]=this.data[2];
this.apply();
if (this.Complete) this.Complete(this);
}
}

zxcAnimate.prototype.apply=function(){
if (isFinite(this.data[0])){
if (this.data[0]<0&&!this.neg) this.data[0]=0;
if (this.mde!='opacity') this.obj.style[this.mde]=Math.floor(this.data[0])+'px';
else zxcOpacity(this.obj,this.data[0]);
}
}

function zxcOpacity(obj,opc){
if (opc<0||opc>100) return;
obj.style.filter='alpha(opacity='+opc+')';
obj.style.opacity=obj.style.MozOpacity=obj.style.KhtmlOpacity=opc/100-.001;
}

</script>

<script type="text/javascript" >

//Specify background images to slide
var bgslides=[
"http://www.vicsjavascripts.org.uk/StdImages/One.gif",
"http://www.vicsjavascripts.org.uk/StdImages/Two.gif",
"http://www.vicsjavascripts.org.uk/StdImages/Three.gif",
"http://www.vicsjavascripts.org.uk/StdImages/Four.gif",
];

//preload images
for (var src,i=0;i<bgslides.length;i++){
src=bgslides[i];
bgslides[i]=new Image();
bgslides[i].src=src;
}

function BRChanger(o){
this.obj=document.getElementById(o.ID);
this.ary=o.ImageArray;
this.ms=o.Speed||1000;
this.oop=new zxcAnimate('backgroundPosition',this.obj)
this.Rotate();
}

BRChanger.prototype.Rotate=function(){
this.obj.style.backgroundImage='url('+this.ary[Math.floor(Math.random()*(this.ary.length-1))].src+')';
this.oop.animate(this.obj.offsetHeight,0,this.ms/2);
var oop=this;
this.to=setTimeout(function(){ oop.Rotate(); },this.ms);
}

</script>



</head>

<body>
<div id="D1" ></div>
<div id="D2" ></div>
<script type="text/javascript">

new BRChanger({
ID:'D1',
ImageArray:bgslides,
Speed:2000
});

new BRChanger({
ID:'D2',
ImageArray:bgslides,
Speed:1000
});

</script>
</body>

</html>

illusive817

05-26-2010, 09:15 PM

great script thanks

I dont completely understand how to control it, can it do a fade in/out?
and how can i change the time it takes to scroll in?

Sorry for my noobness , and again Thank you