javascript - How to evenly time fading transitions? -


so i'm trying create simple slide show scratch, , far able full screen images fade out , fade in infinetly, odd reason using setinterval(function(){fade(var)}, 3500);didn't work, maybe can explain why first , last images took way longer 3,5 seconds fade. meanwhile, trying solve problem implementing callback function in fade(). example has 4 images, , start fading out until reaches image one, don't fade out image 1 , start fading in image 2 until image 4, , forever, here recent attempt implement callback function:

var = 4;  $(document).ready(function(){             fade(i, fade); });  var fadein = false; function fade(objectid, callbackfn){     var fadetime = 3500;     if(!fadein){         $("#slide-"+objectid).fadeout(fadetime);         i--;         if(i === 1) {             fadein = true;         }     }     else{         i++;         $("#slide-"+objectid).fadein(fadetime);         if(i === 4){             fadein = false;         }     }     if(arguments[1]){         callbackfn(i);     } }

but not working, fades out image 4, image 3 , stops on image 2. maybe there way evenly time fading transitions using setintervel(), if can tell me how? appreciate help.

here jsfiddle code: http://jsfiddle.net/8kgc0chq/ not working tho.

here doc .fadeout()

there optional argument complete:

a function call once animation complete.

put next animation in there, take complete (callback) function.

$("#id").fadeout(fadetime, function() {     // code execute after animation complete  });

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