function onLoad() {

                //alert("works");

                document.getElementById('img1').style['left'] = "-500px";

                img1Tween= new Tween (document.getElementById('img1').style,'left',Tween.regularEaseIn, -500,0,2,'px');

               

                document.getElementById('img2').style['top'] = "-300px";

                img2Tween= new Tween (document.getElementById('img2').style,'top',Tween.regularEaseIn, -300,0,1,'px');

               

                //img3

                document.getElementById('img3').style['left'] = "-400px";

                img3Tween= new Tween (document.getElementById('img3').style,'left',Tween.regularEaseIn, -400,200,2,'px');

               

                //img4

                document.getElementById('img4').style['top'] = "900px";

                img4Tween= new Tween (document.getElementById('img4').style,'top',Tween.regularEaseIn, 900,230,2,'px');

               

                img1Tween.onMotionFinished = function()

                {

                                img2Tween.onMotionFinished = function () {

                                                img3Tween.onMotionFinished = function() {

                                                                img4Tween.start();

                                                };

                                                img3Tween.start();

                                };

                                img2Tween.start()

                };

                img1Tween.start();

}