صورة تهبط الى الشاشة مثل الكرة

 
<script language="JavaScript1.2">
// Original:  Dragos Saracu ([url=http://arab2new.yoo7.com/mailto:smardoi@yahoo.com]smardoi@yahoo.com[/url])
// Cross Browser by:  Bob Simpson ([url=http://arab2new.yoo7.com/mailto:webmaster@maryjanebrown.net]webmaster@maryjanebrown.net[/url])
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function BrowserCheck() {
var b = navigator.appName;
if (b == "Netscape") this.b = "NS";
else if (b == "Microsoft Internet Explorer") this.b = "IE";
else this.b = b;
this.v = parseInt(navigator.appVersion);
this.NS = (this.b == "NS" && this.v>=4);
this.NS4 = (this.b == "NS" && this.v == 4);
this.NS5 = (this.b == "NS" && this.v == 5);
this.IE = (this.b == "IE" && this.v>=4);
this.IE4 = (navigator.userAgent.indexOf('MSIE 4')>0);
this.IE5 = (navigator.userAgent.indexOf('MSIE 5')>0);
if (this.IE5 || this.NS5) this.VER5 = true;
if (this.IE4 || this.NS4) this.VER4 = true;
this.OLD = (! this.VER5 && ! this.VER4) ? true : false;
this.min = (this.NS||this.IE);
}
is = new BrowserCheck();
</script>

 
<div align="center" id="staticBall" style="position:relative;visibility:visible">
 <img src="2.gif" height="35" width="160" alt="كرة ثابتة">
 </div>
 
 <div id="ball" style="visibility:hidden; position:absolute; left:100; top:10; height:34; width:34">
 <img src="2.gif" height="35" width="160" alt="كرة متحركة">
 </div>
 
 <script language="Javascript1.2">
 <!-- Begin
 iter = 0;
 setId = 0;
 down = true;
 up = false;
 bouncingBall = (is.VER5) ? document.getElementById("ball").style
 : (is.NS) ? document.layers["ball"]
 : document.all["ball"].style;
 stillBall = (is.VER5) ? document.getElementById("staticBall").style
 : (is.NS) ? document.layers["staticBall"] : document.all["staticBall"].style;
 winH = (is.NS) ? window.innerHeight - 55 : document.body.offsetHeight - 55;
 document.onmouseup = buttonUp;
 if (is.NS4)
 document.captureEvents(Event.MOUSEUP);
 function buttonUp(e) {
 if ( ((is.NS) ? e.which : event.button) != 1) return true;
 if (setId != 0) clearInterval(setId);
 bouncingBall.visibility="visible";
 stillBall.visibility="hidden";
 bouncingBall.left = (is.NS) ? e.pageX - 15 : event.offsetX - 15;
 bouncingBall.top = (is.NS) ? e.pageY - 15 : event.offsetY - 15;
 iter = 0;
 setId = setInterval("generateGravity()", 20);
 return true;
 }
 function generateGravity() {
 if ((parseInt(bouncingBall.top)+iter < winH) && down) {
 bouncingBall.top = parseInt(bouncingBall.top) + iter;
 iter++;
 return;
 }
 else {
 if ((parseInt(bouncingBall.top)< winH) && down) {
 bouncingBall.top = winH + 5;
 return;
 }
 down = false;
 up = true;
 if (iter < 0 && parseInt(bouncingBall.top) > winH) {
 clearInterval(setId);
 bouncingBall.visibility = "hidden";
 stillBall.visibility="visible";
 setId = 0;
 }
 if (parseInt(bouncingBall.top) > 0 && up && iter >= 0) {
 bouncingBall.top = parseInt(bouncingBall.top) - iter;
 iter--;
 if (iter%3 == 0) iter--;
 return;
 }
 down = true;
 up = false;
    }
 }
 // End -->
 </script>