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Execute functions every 10 seconds

Posted on 2008-06-24
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Last Modified: 2012-08-14
I would like to have this trigger every X number of seconds.

if (this.activeImage != (this.imageArray.length - 1)){

                this.disableKeyboardNav();

                this.changeImage(this.activeImage + 1);

            }

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Question by:bjv211
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6 Comments
 
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Chumad earned 250 total points
ID: 21856386
Lookup the setTimeout function... it works like this:

setTimeout("alert(0)", 10000);  //executes alert every 10 seconds

http://www.w3schools.com/htmldom/met_win_settimeout.asp
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by:ram_0218
ram_0218 earned 250 total points
ID: 21856424
look setInterval function thats what you'r looking for.
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by:bjv211
ID: 21858612
I thought I could figure it out but i can't.  I want to call the following script every 10 seconds in this attached js file (ie, i want the image to change every 10 seconds.

if (this.activeImage != (this.imageArray.length - 1)){
                this.disableKeyboardNav();
                this.changeImage(this.activeImage + 1);
            }

lightbox.txt
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Expert Comment

by:Chumad
ID: 21858753
See attached code.
//the very first call to change the image happens here

setTimeOut("changeImage", 10000);
 

function changeImage() {
 

     //changes the image

     if (this.activeImage != (this.imageArray.length - 1)){

           this.disableKeyboardNav();

           this.changeImage(this.activeImage + 1);

     }
 

     //tell it to execute again in 10 seconds

     setTimeOut("changeImage", 10000);

}

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Author Comment

by:bjv211
ID: 21859672
Chumad, where do I place the first call in th js?
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Author Comment

by:bjv211
ID: 21860077
I placed the setTimeOut line inside the changeImage function (code snippet) and then defined the AdvanceShow function directly after.  This way the timer gets set each time an image is changed:
Will it work this way?


   changeImage: function(imageNum) {   

        

        this.activeImage = imageNum; // update global var
 

        // hide elements during transition

        if (LightboxOptions.animate) this.loading.show();

        this.lightboxImage.hide();

        this.hoverNav.hide();

        this.prevLink.hide();

        this.nextLink.hide();

		// HACK: Opera9 does not currently support scriptaculous opacity and appear fx

        this.imageDataContainer.setStyle({opacity: .0001});

        this.numberDisplay.hide();      

        

        var imgPreloader = new Image();

        

        // once image is preloaded, resize image container

        imgPreloader.onload = (function(){

        this.lightboxImage.src = this.imageArray[this.activeImage][0];

		var maxdims = getVisibleArea();
 
 

//    window.alert( 'Width = ' + maxdims[0] );

//	window.alert( 'Height = ' + maxdims[1] );

var ph=0;

var pw=0;
 

		var lb_max_width = maxdims[0]-20; //if you wish to constrain the width (set to 99999 for unlimited size)

		var lb_max_height = maxdims[1]-85; //if you wish to constring the height (set to 99999 for unlimited size)

		var dims = lb_scale_dims(imgPreloader.width, imgPreloader.height, lb_max_width, lb_max_height);

		this.lightboxImage.setStyle({ width: dims[0] + 'px', left: dims[1] + 'px' });

		this.resizeImageContainer(dims[0], dims[1]);

//		this.resizeImageContainer(imgPreloader.width, imgPreloader.height);

        }).bind(this);

        imgPreloader.src = this.imageArray[this.activeImage][0];

     	setTimeOut("this.AdvanceShow()", 5000);

    },
 

AdvanceShow: function() {

     //changes the image

     if (this.activeImage != (this.imageArray.length - 1))

	 {

           this.disableKeyboardNav();

           this.changeImage(this.activeImage + 1);

     }

},

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