鼠标周围的旋转宣传文字，又是一种很酷的效果
<!-- 要实现此效果需要 1 个步骤： -->
<!-- 第 1 步： -->
<!-- 把下面的代码加到<BODY></BODY>区域中： -->
<script LANGUAGE="Javascript1.2">
<!--//
// your message here
var msg='welcome to webasp.net';
var font='Verdana,Arial';
var size=7; // up to seven
var color='#ffcc33';
// This is not the rotation speed, its the reaction speed, keep low!
// Set this to 1 for just plain rotation w/out drag
var speed=.2;
// This is the rotation speed, set it negative if you want
// it to spin clockwise
var rotation=.2;
// Alter no variables past here!, unless you are good
//---------------------------------------------------
var ns=(document.layers);
var ie=(document.all);
var msg=msg.split('');
var n=msg.length;
var a=size*15;
var currStep=0;
var ymouse=0;
var xmouse=0;
var scrll=0;
var props="<font face="+font+" size="+size+" color="+color+">";
if (ie)
window.pageYOffset=0
// writes the message
if (ns){
for (i=0; i < n; i++)
document.write('<layer name="nsmsg'+i+'" top=0 left=0 height='+a+' width='+a+'><center>'+props+msg[i]+'</font></center></layer>');
}
if (ie){
document.write('<div id="outer" style="position:absolute;top:0px;left:0px"><div style="position:relative">');
for (i=0; i < n; i++)
document.write('<div id="iemsg" style="position:absolute;top:0px;left:0;height:'+a+';width:'+a+';text-align:center;font-weight:regular;cursor:default">'+props+msg[i]+'</font></div>');
document.write('</div></div>');
}
(ns)?window.captureEvents(Event.MOUSEMOVE):0;
function Mouse(evnt){
ymouse = (ns)?evnt.pageY+20-(window.pageYOffset):event.y; // y-position
xmouse = (ns)?evnt.pageX+20:event.x-20; // x-position
}
if (ns||ie)
(ns)?window.onMouseMove=Mouse:document.onmousemove=Mouse;
y=new Array();
x=new Array();
Y=new Array();
X=new Array();
for (i=0; i < n; i++){
y[i]=0;
x[i]=0;
Y[i]=0;
X[i]=0;
}
function makecircle(){ // rotation properties
if (ie) outer.style.top=document.body.scrollTop;
currStep-=rotation;
for (i=0; i < n; i++){ // makes the circle
var d=(ns)?document.layers['nsmsg'+i]:iemsg[i].style;
d.top=y[i]+a*Math.sin((currStep+i*1)/3.8)+window.pageYOffset-15;
d.left=x[i]+a*Math.cos((currStep+i*1)/3.8)*2; // remove *2 for just a plain circle, not oval
}
}
function drag(){ // makes the resistance
scrll=(ns)?window.pageYOffset:0;
y[0]=Math.round(Y[0]+=((ymouse)-Y[0])*speed);
x[0]=Math.round(X[0]+=((xmouse)-X[0])*speed);
for (var i=1; i < n; i++){
y[i]=Math.round(Y[i]+=(y[i-1]-Y[i])*speed);
x[i]=Math.round(X[i]+=(x[i-1]-X[i])*speed);
}
makecircle();
// not rotation speed, leave at zero
setTimeout('drag()',10);
}
if (ns||ie)window.onload=drag;
// -->
</script>
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