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  1. #1
    Regular Coder ubh's Avatar
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    FadeIn Script FF opacity?

    Hey I got this really nice little script here that first detects the browser to isolate IE.. cause well.. you know. Then it fades in desired page elements. Problem is haha and I think this is a first is that it works in IE just fine but not in FF..

    anyone got any ideas?
    Thanks

    Code:
    	var browserName=navigator.appName;
    		if (browserName=="Netscape")
    		{ 
    			browser="Mozilla";
    			
    		}
    		else 
    		{ 
    		 if (browserName=="Microsoft Internet Explorer")
    		 {
    			
    			browser="IE";
    			
    		 }
    		 else
    		  {
    			browser="Mozilla";
    		   }
    		}
    
    //Called to fade element
    function fadeIn(element)
    {
      //We will fade the object in 10 steps
      var steps = 25;
      
      //Set the starting opacity
      setOpacity(element, 0);
      
      //Loops the timer function
      for(i=0; i<steps; ++i) {
        setTimeout(function(){fadeCallback(element);}, (30*i));
      }
    }
    
    //Callback to timer function
    function fadeCallback(element)
    {
      //Get the current opacity
      var opacity=getOpacity(element);
      
      //Set the new opacity
      setOpacity(element, opacity+0.05);
    }
    
    //Gets an element's opacity
    function getOpacity(element)
    {
      var opacity = null;
      
      //Get the opacity based on the current browser used
      if(browser=="IE") {
        filter = element.style.filter;
        if(filter) {
          alpha = filter.split("alpha(opacity=");
          opacity = alpha[1].substr(0,(alpha[1].length-1))/100;
        }
      }
      else {
        opacity = element.style.opacity;
      }
        
      return opacity;
    }
    
    //Sets an element's opacity
    function setOpacity(element, o)
    {
      //Set the opacity based on the current browser used
      if(browser=="IE") {
        element.style.filter = "alpha(opacity=" + (o*100) + ")";
      }
      else {
        element.style.opacity = o;
      }
    }
    You can call it inline or from a function with this,
    Code:
    fadeIn(logo);
    Last edited by ubh; 10-06-2008 at 09:57 PM.

  • #2
    Supreme Master coder! abduraooft's Avatar
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    The Dream is not what you see in sleep; Dream is the thing which doesn't let you sleep. --(Dr. APJ. Abdul Kalam)

  • Users who have thanked abduraooft for this post:

    ubh (10-06-2008)

  • #3
    Senior Coder
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    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>
    <script language="JavaScript" type="text/javascript">
    /*<![CDATA[*/
    
    function fadeIn(element,inc,srt){
     inc=inc||1;
     if (!srt) element.cnt=0;
     element.cnt+=inc;
     zxcOpacity(element,element.cnt);
     if (element.cnt-inc<100) element.to=setTimeout(function(){fadeIn(element,inc,true);},10);
    }
    
    
    function zxcOpacity(zxcobj,zxcopc){
     if (zxcopc<0||zxcopc>100) return;
     zxcobj.style.filter='alpha(opacity='+zxcopc+')';
     zxcobj.style.opacity=zxcobj.style.MozOpacity=zxcobj.style.KhtmlOpacity=zxcopc/100-.001;
    }
    
    /*]]>*/
    </script></head>
    
    <body>
    <input type="button" name="" value="Test" onclick="fadeIn(document.getElementById('tst'),5);" />
    <div id="tst" style="width:100pz;height:100px;background-Color:red;"></div>
    </body>
    
    </html>
    Vic

    God Loves You and will never love you less.

    http://www.vicsjavascripts.org/Home.htm

    If my post has been useful please donate to http://www.operationsmile.org.uk/

  • Users who have thanked vwphillips for this post:

    ubh (10-06-2008)

  • #4
    Regular Coder ubh's Avatar
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    WOW awesome thanks guys!! I will give your code a shot vwphillips. I have a one more question. Same scenario, I moved away from that script and found JS Motion Tween class with opacity class. I really like it quite user friendly.

    JS Motion Tween

    Same problem though FF wont work the script right but IE will.

    Code:
    //This function gets called in body onload=""
    function onload()
    {
    opacityTween = new OpacityTween(document.getElementById('logo'),Tween.bounceEaseOut, 0, 100, 1);
    opacityTween.start();
    }
    I in fact do have the classes linked in the correct order

    Code:
    <script type="text/javascript" src="scripts/tween.js"></script>
    <script type="text/javascript" src="scripts/opacityTween.js"></script>
    And my element is ready for IE to use CSS filter
    Code:
    style="filter:Alpha(opacity=0);"
    This works with IE but not FF.
    On the demos page of JS Motion Tween all demos work perfectly in both IE/FF... I am lost... that or sleep deprived.

  • #5
    Regular Coder ubh's Avatar
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    Duh I figured it out. I was calling the function onload() and placing it in an onload attribute. oops, soon as I changed the name oh and also added opacity:0; to the inline of my element everything worked perfect.

    Anyone know how far back is CSS opacity supported on FF and IE?

  • #6
    Senior Coder
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    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>
    
    <script language="JavaScript" type="text/javascript">
    /*<![CDATA[*/
    // Basic Element Animator (04-October-2008) DRAFT
    // 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 an optional 'bounce'.
    
    // **** 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('left','tst1',20,260,2000,10,2,500);'
    // where:
    // parameter 0 = the mode(see Note 1).                                                                     (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) the maximum bounce.                                                            (digits)
    // parameter 6 = (optional) the number of bounces.                                                         (digits or defaults to 2)
    // parameter 7 = (optional) the bounce duration in milliseconds.                                           (digits or defaults to parameter 4/10)
    //
    //  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.
    //
    // **** 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(/[-#]/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(1.8 to 2.5K) is best as an External JavaScript.
    //
    // Tested with IE7 and Mozilla FireFox on a PC.
    //
    
    
    
    // **** Functional Code - NO NEED to Change
    
    
    function zxcBAnimator(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime,zxcbsz,zxcbnu,zxcbspd){
     if (typeof(zxcobj)=='string'){ zxcobj=document.getElementById(zxcobj); }
     if (!zxcobj||(!zxcsrt&&!zxcfin)||zxcsrt==zxcfin) return;
     var zxcoop=zxcobj[zxcmde.replace(/[-#]/g,'')+'oop'];
     if (zxcoop){
      clearTimeout(zxcoop.to);
      if (zxcoop.srtfin[0]==zxcsrt&&zxcoop.srtfin[1]==zxcfin&&zxcmde.match('#')) zxcoop.update([zxcoop.data[0],(zxcoop.srtfin[0]==zxcoop.data[2])?zxcfin:zxcsrt],zxctime,zxcbsz,zxcbnu,zxcbspd);
      else zxcoop.update([zxcsrt,zxcfin],zxctime,zxcbsz,zxcbnu,zxcbspd);
     }
     else zxcobj[zxcmde.replace(/[-#]/g,'')+'oop']=new zxcBAnimatorOOP(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime,zxcbsz,zxcbnu,zxcbspd);
    }
    
    function zxcBAnimatorOOP(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime,zxcbsz,zxcbnu,zxcbspd){
     this.srtfin=[zxcsrt,zxcfin];
     this.to=null;
     this.obj=zxcobj;
     this.mde=zxcmde.replace(/[-#]/g,'');
     this.update([zxcsrt,zxcfin],zxctime,zxcbsz,zxcbnu,zxcbspd);
    }
    
    zxcBAnimatorOOP.prototype.update=function(zxcsrtfin,zxctime,zxcbsz,zxcbnu,zxcbspd){
     this.time=zxctime||this.time||2000;
     if (zxcbsz){ this.bnu=zxcbnu; this.bsrt=this.bnu; this.bnc=zxcbsz; this.bspd=zxcbspd||this.time/10; }
     this.data=[zxcsrtfin[0],zxcsrtfin[0],zxcsrtfin[1]];
     this.srttime=new Date().getTime();
     this.cng();
    }
    
    zxcBAnimatorOOP.prototype.cng=function(){
     var zxcms=new Date().getTime()-this.srttime;
     this.data[0]=(this.data[2]-this.data[1])/this.time*zxcms+this.data[1];
     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  this.opacity(this.data[0]);
     if (zxcms<this.time) this.to=setTimeout(function(zxcoop){return function(){zxcoop.cng();}}(this), 10);
     else {
      this.data[0]=this.data[2];
      if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
      else  this.opacity(this.data[0]);
      if (this.bnu&&this.bnu==this.bsrt) this.bounce(this.data[0]);
     }
    }
    
    // Optional Function
    zxcBAnimatorOOP.prototype.bounce=function(zxcfin){
     this.bnu--;
     this.update([this.data[0],this.bnu%2==0?zxcfin:this.bnc],this.bspd);
     if (this.bnu%2==0){
      if (this.bnc>zxcfin) this.bnc/=2;
      else this.bnc=zxcfin-((zxcfin-this.bnc)/2);
     }
     if (this.bnu>0) this.to=setTimeout(function(zxcoop){return function(){zxcoop.bounce(zxcfin);}}(this),this.bspd);
    }
    
    // Optional Function
    zxcBAnimatorOOP.prototype.opacity=function(zxcopc){
     if (zxcopc<0||zxcopc>100){ return; }
     this.obj.style.filter='alpha(opacity='+zxcopc+')';
     this.obj.style.opacity=this.obj.style.MozOpacity=this.obj.style.KhtmlOpacity=zxcopc/100-.001;
    }
    
    
    /*]]>*/
    </script>
    
    </head>
    
    <body>
    <div id="tst" style="position:absolute;left:100px;top:100px;height:100px;width:100px;background-Color:red;" ></div>
    <input type="button" name="" value="Test 1" onclick="zxcBAnimator('opacity','tst',100,0,1000,10,4,500);"/>
    <input type="button" name="" value="Test 2" onclick="zxcBAnimator('opacity','tst',0,100,1000,50,4,500);"/>
    <input type="button" name="" value="Test 2" onclick="zxcBAnimator('height','tst',0,100,1000,90,4,500);"/>
    </body>
    
    </html>
    Vic

    God Loves You and will never love you less.

    http://www.vicsjavascripts.org/Home.htm

    If my post has been useful please donate to http://www.operationsmile.org.uk/

  • Users who have thanked vwphillips for this post:

    ubh (10-06-2008)


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