漂浮的文字跟随鼠标，到鼠标下方就会自动消失

- 中国WEB开发者网络 (http://www.webasp.net)
-- 网页特效 (http://www.webasp.net/javascript/)
--- 漂浮的文字跟随鼠标，到鼠标下方就会自动消失 (http://www.webasp.net/javascript/1/491.htm)
-- 发布日期： 2005-06-14
<!-- 网页特效代码由[中国WEB开发者网络:http://www.ChinaWebDev.com]提供！ -->
<!-- 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=JavaScript>
<!--

//Stuff to change!------------------
msg="有问题请与我联系!";
mail="mailto:webmaster@javascript2000.com";
fnt='Verdana';
fsze='2';
speed=1;
//----------------------------------

Y=0,X=0,my=0,mx=0,angle=0,dy=0,dx=0,tmr=null;
ns=(document.layers)?1:0;
off=(document.layers)?'hide':'hidden';
on=(document.layers)?'show':'visible';
if (ns)
document.write('<layer name=n top=0 left=0><font face='+fnt+' size='+fsze+'><a href='+mail+'>'+msg+'</a></font></layer>');
else{
document.write('<div id="c" style="position:absolute"><div style="position:relative">');
document.write('<div id="i" style="position:absolute;width:200px;height:30px"><font face='+fnt+' size='+fsze+'><a href='+mail+'>'+msg+'</a></font></div>');
document.write('</div></div>');
}
if (ns){
window.captureEvents(Event.MOUSEMOVE);
function nMouse(evnt){
my=evnt.pageY+20;mx=evnt.pageX
}
}
else{
function iMouse(){
my=event.y+20;mx=event.x;
}
}
function stalk(){
if (ns) window.onMouseMove=nMouse;
else {document.onmousemove=iMouse;c.style.top=document.body.scrollTop}
var layer=(document.layers)?document.n:i.style;
Y=my-dy;X=mx-dx;
angle=Math.round(Math.atan2(Y,X)*180/Math.PI);
if (angle < 0) angle += 360;
y = Math.round(speed*Math.sin(angle*Math.PI/180));x = Math.round(speed*Math.cos(angle*Math.PI/180));
dy+=y;dx+=x;
if ((dy > my-speed*2) && (dx > mx-speed*2) && (dy < my+speed*2) && (dx < mx+speed*2))
{clearTimeout(tmr);layer.visibility=off;}
else{layer.visibility=on;layer.top=dy;layer.left=dx}
tmr=setTimeout('stalk()',10);
}
stalk();
//-->
</SCRIPT>


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