shayak

Yep, that was exactly the problem - ypos[d] evaluated to undefined at the end before restarting the whole cycle. Thanks for the quick response & keep up the great work!

I'm getting the "Invalid Argument, Line 14, Character 10552" error from CSSPlugin.min.js on IE8 (Standards mode). Here's the bare essentials of the code that makes the TweenLite / CSSPlugin call to animate the "top" property: var sl = document.getElementById('theSlidesContnr'); var ypos = []; var slideHeight = $('.slide:first').outerHeight(); var totalSlides = $('#theSlidesContnr div.slide').length; var automove = true; var snum; var run; var speed = 3000; function moveSlide() { var d; if(automove) { if(snum === undefined) snum = 1; d = snum; if( snum < totalSlides ) { snum++; } else if( snum >= totalSlides ) { snum = 1; } } TweenLite.to(sl, 1, { css:{ top:ypos[d] }, ease:Power4.easeOut }); //TweenLite.to(sl, 1, { css:{ top:parseInt(ypos[d]) }, ease:Power4.easeOut }); } function autoRotate() { run = window.setInterval( moveSlide, speed); } function init() { for( var i=0; i < totalSlides; i++) ypos[i] = -(slideHeight * i); autoRotate(); } init(); Tried both "//{ css:{ top:ypos[d] }" and "{ css:{ top:parseInt(ypos[d]) }" but got the same error. The same code works fine in the standards browsers & IE7. I made sure to grab the latest greensock JS download. This is similar to another CSSPlugin error in IE8 but for a different line/character location in the code.