JavaScript如何实现图象指着鼠标转？
JavaScript如何实现图象指着鼠标转 ，就是当鼠标绕着图象运行，图象像时钟指针那样，定点指着鼠标转，鼠标走到哪它指到哪！（我说得够白的了）
参考答案:1
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>围绕图片疯狂旋转的花朵</title>
</head>
<body>
<script language="JavaScript">
<!--
var images='images/flower2.gif';//将图片名称改为你的图像!
var amount=7;//Number of images here. Do not alter for this script!!
var speed=1;
var RunTime = 0;
var cntr=0;
var xcntr=100;
var pulse=25;
var Xpos = 0;
var Ypos = 0;
var _y;
var temp;
/*If you use an image larger or smaller than the one I've used
the cursor will be off center.Alter the 2 variables below to center it.*/
var UpDown=-10;
var LeftRight=-5;
if (document.all){
document.write('<div id="ieDiv" style="position:absolute;top:0px;left:0px">');
document.write('<div id="c" style="position:relative">');
for (n=0; n < amount; n++)
document.write('<img src="'+images+'" style="position:absolute;top:0px;left:0px;visibility:hidden">');
document.write('</div>');
document.write('</div>');
function FollowMouse(){
Xpos = document.body.scrollLeft+event.x+UpDown;
Ypos = document.body.scrollTop+event.y+LeftRight;
}
document.onmousemove = FollowMouse;
}
else if (document.layers){
window.captureEvents(Event.MOUSEMOVE);
function xFollowMouse(evnt){
Xpos = evnt.pageX+UpDown;
Ypos = evnt.pageY+LeftRight;
}
window.onMouseMove = xFollowMouse;
for (ns=0; ns < amount; ns++)
document.write("<LAYER NAME='n"+ns+"' LEFT=0 TOP=0 VISIBILITY=HIDE><IMG SRC='"+images+"'></LAYER>");
}
function msi(){
if (document.layers){
for ( i = 0 ; i < ns ; i++ )
{
temp="n"+i
document.layers[0].visibility='show';
document.layers[0].top = Ypos+cntr*Math.cos((RunTime+i*4.5)/5);
document.layers[0].left =Xpos+cntr*Math.sin((RunTime+i*4.5)/5);
}
cntr+=1;
RunTime+=speed;
stp=setTimeout('msi()',10);
if (cntr>=100)
{
cntr=100;
speed=2.5;
for ( i = 0 ; i < ns ; i++ )
{
temp="n"+i
document.layers[temp].visibility='show';
document.layers[temp].top=Ypos+cntr*Math.cos((RunTime-100)*i/90);
document.layers[temp].left=Xpos+cntr*Math.sin((RunTime-100)*i/90);
}
}
if (RunTime>182)
{
speed=0.5;
for ( i = 0 ; i < ns ; i++ )
{
temp="n"+i
document.layers[temp].top=Ypos+xcntr*Math.cos(((RunTime-182)+i*4.5)/5);
document.layers[temp].left=Xpos+xcntr*Math.sin(((RunTime-182)+i*4.5)/5)*Math.cos((RunTime-182)/5);
}
}
}
else if (document.all){
for (i=0;i<ieDiv.all.c.all.length;i++)
{
ieDiv.all.c.all[0].style.visibility='visible';
ieDiv.all.c.all[0].style.top=Ypos+cntr*Math.cos((RunTime+i*4.5)/5);
ieDiv.all.c.all[0].style.left=Xpos+cntr*Math.sin((RunTime+i*4.5)/5);
}
cntr+=1;
RunTime+=speed;
stp=setTimeout('msi()',10);
if (cntr>=100)
{
cntr=100;
speed=2.5;
for (i=0;i<ieDiv.all.c.all.length;i++)
{
ieDiv.all.c.all[i].style.visibility='visible';
ieDiv.all.c.all[i].style.top=Ypos+cntr*Math.cos((RunTime-100)*i/90);
ieDiv.all.c.all[i].style.left=Xpos+cntr*Math.sin((RunTime-100)*i/90);
}
}
if (RunTime>182)
{
speed=0.5;
for (i=0;i<ieDiv.all.c.all.length;i++)
{
ieDiv.all.c.all[i].style.top=Ypos+xcntr*Math.cos(((RunTime-182)+i*4.5)/5);
ieDiv.all.c.all[i].style.left=Xpos+xcntr*Math.sin(((RunTime-182)+i*4.5)/5)*Math.cos((RunTime-182)/5);
}
}
}
if (RunTime>210)
{
xcntr-=10;
}
if (document.layers)
_y=-window.innerWidth-90;
else if (document.all)
_y=-document.body.clientWidth-90;
if (xcntr <= _y)
{
RunTime=0;
speed=1;
cntr=0;
xcntr=100;
}
}
msi()
//-->
</script>
</body>
</html>
2
<html>
<head>
<title>很酷的跟随鼠标的三色彩带</title>
</head><body bgColor=#000000>
<!--将以下代码加入HTML的<Body></Body>之间-->
<script language="JavaScript">
<!--
var a_Colour='fff000';
var b_Colour='00ff00';
var c_Colour='ff00ff';
var Size=120;
var YDummy=new Array(),XDummy=new Array(),xpos=0,ypos=0,ThisStep=0;step=0.6;
if (document.layers){
window.captureEvents(Event.MOUSEMOVE);
function nsMouse(evnt){
xpos = window.pageYOffset+evnt.pageX+6;
ypos = window.pageYOffset+evnt.pageY+16;
}
window.onMouseMove = nsMouse;
}
else if (document.all)
{
function ieMouse(){
xpos = document.body.scrollLeft+event.x+6;
ypos = document.body.scrollTop+event.y+16;
}
document.onmousemove = ieMouse;
}
function swirl(){
for (i = 0; i < 3; i++)
{
YDummy[i]=ypos+Size*Math.sin((1*Math.sin((ThisStep)/10))+i*2)*Math.sin((ThisStep)/4);
XDummy[i]=xpos+Size*Math.cos((1*Math.sin((ThisStep)/10))+i*2)*Math.sin((ThisStep)/4);
}
ThisStep+=step;
setTimeout('swirl()',10);
}
var amount=10;
if (document.layers){
for (i = 0; i < amount; i++)
{
document.write('<layer name=nsa'+i+' top=0 left=0 width='+i/2+' height='+i/2+' bgcolor='+a_Colour+'></layer>');
document.write('<layer name=nsb'+i+' top=0 left=0 width='+i/2+' height='+i/2+' bgcolor='+b_Colour+'></layer>');
document.write('<layer name=nsc'+i+' top=0 left=0 width='+i/2+' height='+i/2+' bgcolor='+c_Colour+'></layer>');
}
}
else if (document.all){
document.write('<div id="ODiv" style="position:absolute;top:0px;left:0px">'
+'<div id="IDiv" style="position:relative">');
for (i = 0; i < amount; i++)
{
document.write('<div id=x style="position:absolute;top:0px;left:0px;width:'+i/2+';height:'+i/2+';background:'+a_Colour+';font-size:'+i/2+'"></div>');
document.write('<div id=y style="position:absolute;top:0px;left:0px;width:'+i/2+';height:'+i/2+';background:'+b_Colour+';font-size:'+i/2+'"></div>');
document.write('<div id=z style="position:absolute;top:0px;left:0px;width:'+i/2+';height:'+i/2+';background:'+c_Colour+';font-size:'+i/2+'"></div>');
}
document.write('</div></div>');
}
function prepos(){
var ntscp=document.layers;
var msie=document.all;
if (document.layers){
for (i = 0; i < amount; i++)
{
if (i < amount-1)
{
ntscp['nsa'+i].top=ntscp['nsa'+(i+1)].top;ntscp['nsa'+i].left=ntscp['nsa'+(i+1)].left;
ntscp['nsb'+i].top=ntscp['nsb'+(i+1)].top;ntscp['nsb'+i].left=ntscp['nsb'+(i+1)].left;
ntscp['nsc'+i].top=ntscp['nsc'+(i+1)].top;ntscp['nsc'+i].left=ntscp['nsc'+(i+1)].left;
}
else
{
ntscp['nsa'+i].top=YDummy[0];ntscp['nsa'+i].left=XDummy[0];
ntscp['nsb'+i].top=YDummy[1];ntscp['nsb'+i].left=XDummy[1];
ntscp['nsc'+i].top=YDummy[2];ntscp['nsc'+i].left=XDummy[2];
}
}
}
else if (document.all){
for (i = 0; i < amount; i++)
{
if (i < amount-1)
{
msie.x[i].style.top=msie.x[i+1].style.top;msie.x[i].style.left=msie.x[i+1].style.left;
msie.y[i].style.top=msie.y[i+1].style.top;msie.y[i].style.left=msie.y[i+1].style.left;
msie.z[i].style.top=msie.z[i+1].style.top;msie.z[i].style.left=msie.z[i+1].style.left;
}
else
{
msie.x[i].style.top=YDummy[0];msie.x[i].style.left=XDummy[0];
msie.y[i].style.top=YDummy[1];msie.y[i].style.left=XDummy[1];
msie.z[i].style.top=YDummy[2];msie.z[i].style.left=XDummy[2];
}
}
}
setTimeout("prepos()",10);
}
function Start(){
swirl(),prepos()
}
window.onload=Start;
// -->
</script>
</body></html>
3
<html>
<head>
<title>围绕鼠标的立体星环</title>
<meta content="text/html; charset=gb2312" http-equiv="Content-Type">
<script language="JavaScript">
<!--
ns=(document.layers)?1:0;
Clrs=new Array('ff0000','00ff00','ffffff','ff00ff','ffa500','ffff00','00ff00','ffffff','ff00ff')
var amount=8
var step=0.3;
var currStep=0;
var Ypos=0;
var Xpos=0;
if (ns){
for (i=0; i < amount; i++)
document.write('<LAYER NAME="n'+i+'" LEFT=0 TOP=0 BGCOLOR=#FFFFFF CLIP="0,0,2,2"></LAYER>');
window.captureEvents(Event.MOUSEMOVE);
function nMouse(evnt){
Ypos = evnt.pageY;
Xpos = evnt.pageX;
}
window.onMouseMove=nMouse;
}
else{
document.write('<div style="position:absolute;top:0px;left:0px">');
document.write('<div style="position:relative">');
for (i=0; i < amount; i++)
document.write('<div id="me" style="position:absolute;top:0px;left:0px;width:2px;height:2px;font-size:2px;background:#00aaff"></div>');
document.write('</div></div>');
function iMouse(){
Ypos=event.y+document.body.scrollTop;
Xpos=event.x+document.body.scrollLeft;
}
document.onmousemove = iMouse;
}
function Comet(){
for (i=0; i < amount; i++){
var randCol=Math.floor(Math.random()*Clrs.length);
var layer=(document.layers)?document.layers['n'+i]:me[i].style;
layer.top =Ypos+60*Math.sin((currStep + i*3.1)/4)*Math.cos(currStep/10);
layer.left=Xpos+60*Math.cos((currStep + i*3.1)/4);
if (ns) layer.bgColor=Clrs[randCol];else layer.background=Clrs[randCol];
}
currStep+=step;
setTimeout("Comet()",10);
}
window.onload=Comet;
// -->
</script>
</head>
<body bgcolor="#000000">
</body>
</html>