Code/Script on hover fade in

**jkl47** · 08-28-2010, 01:44 PM

Hi,

I hope someone can help me, I'm looking for a script that when you over over an image the image will fade to another image.

How can this be done please?

**vwphillips** · 08-28-2010, 02:46 PM

Code:

<!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 type="text/css">
/*<![CDATA[*/

.hover {
  position:relative;width:100px;height:100px;float:left;
}

.hover IMG{
  position:absolute;left:0px;top:0px;width:100px;height:100px;
}

/*]]>*/
</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(1.52K) - 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();
 },

 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);
  }
 },

 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.WebkitOpacity=obj.style.KhtmlOpacity=opc/100-.001;
}


</script>

<script type="text/javascript">
/*<![CDATA[*/

function hover(obj,ms){
 if (!obj.oop){
  obj.oop=new zxcAnimate('opacity',obj.getElementsByTagName('IMG')[0]);
  obj.oop.animate(0,100,ms||1000);
  obj.oop.obj.style.zIndex='1';
 }
}

/*]]>*/
</script>
</head>

<body>
<div class="hover" onmouseover="hover(this,2500);">
<img src="http://www.vicsjavascripts.org.uk/StdImages/One.gif" />
<img src="http://www.vicsjavascripts.org.uk/StdImages/Two.gif" />
</div>
<div class="hover" onmouseover="hover(this,500);">
<img src="http://www.vicsjavascripts.org.uk/StdImages/Four.gif" />
<img src="http://www.vicsjavascripts.org.uk/StdImages/Two.gif" />
</div>
</body>

</html>

**jkl47** · 08-28-2010, 03:49 PM

Thanks very much vwphillips, I did leave something out though can I make it do the reverse when the mouse moves off the image to return to the original?

Thanks!

**jkl47** · 08-29-2010, 04:55 PM

Is there not a way to do this with javascript? As I understand you can mouse over but am not sure if you can on mouse out.

Thanks

**djr33** · 08-29-2010, 06:07 PM

Yes it is possible and only in JavaScript. I don't have an exact answer for you at the moment though.

**vwphillips** · 08-30-2010, 09:04 AM

Code:

<!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 type="text/css">
/*<![CDATA[*/

.hover {
  position:relative;width:100px;height:100px;float:left;
}

.hover IMG{
  position:absolute;left:0px;top:0px;width:100px;height:100px;
}

/*]]>*/
</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(1.52K) - 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();
 },

 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);
  }
 },

 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.WebkitOpacity=obj.style.KhtmlOpacity=opc/100-.001;
}


</script>

<script type="text/javascript">
/*<![CDATA[*/

function hover(obj,ms,ud){
 if (!obj.oop){
  obj.oop=new zxcAnimate('opacity',obj.getElementsByTagName('IMG')[0]);
  obj.oop.Comptete=function(){
   if (this.data[0]==0){
    this.obj.style.zIndex='0';
   }
  }
 }
 obj.oop.obj.style.zIndex='1';
 obj.oop.animate(obj.oop.data[0],ud?100:0,ms||1000,[0,100]);
}

/*]]>*/
</script>
</head>

<body>
<div class="hover" onmouseover="hover(this,2500,true);" onmouseout="hover(this,2500);">
<img src="http://www.vicsjavascripts.org.uk/StdImages/One.gif" />
<img src="http://www.vicsjavascripts.org.uk/StdImages/Two.gif" />
</div>
<div class="hover" onmouseover="hover(this,500,true);" onmouseout="hover(this,2500);">
<img src="http://www.vicsjavascripts.org.uk/StdImages/Four.gif" />
<img src="http://www.vicsjavascripts.org.uk/StdImages/Two.gif" />
</div>
</body>

</html>

**jkl47** · 08-30-2010, 09:46 PM

Thanks... works a treat! It is for a link, the only problem is if someone presses the back button if they press a link the image will be stuck on the second image not the first one as it does not know to fade out as the mouse did not move out of the area when the link is pressed.

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