19、跟随鼠标的小星星
类别: JavaScript教程 
====1、将以下代码加入到HEML的<head></head>之间：
<STYLE TYPE="text/css">
<!--
BODY{
overflow:scroll;
overflow-x:hidden;
}
.s1
{
position : absolute;
font-size : 12pt;
color : blue;
visibility: hidden;
}
.s2
{
position : absolute;
font-size : 20pt;
color : red;
visibility : hidden;
}
.s3
{
position : absolute;
font-size : 16pt;
color : gold;
visibility : hidden;
}
.s4
{
position : absolute;
font-size : 14pt;
color : lime;
visibility : hidden;
}
-->
</STYLE>
====2、将以下代码加入HTML的<body></body>之间：
<DIV ID="div1" CLASS="s1">*</DIV>
<DIV ID="div2" CLASS="s2">*</DIV>
<DIV ID="div3" CLASS="s3">*</DIV>
<DIV ID="div4" CLASS="s4">*</DIV>
<script language="javascript" type="text/javascript" class="s5">
var nav = (document.layers);
var tmr = null;
var spd = 50;
var x = 0;
var x_offset = 5;
var y = 0;
var y_offset = 15;
if(nav) document.captureEvents(Event.MOUSEMOVE);
document.onmousemove = get_mouse;
function get_mouse(e)
{
x = (nav) ? e.pageX : event.clientX+document.body.scrollLeft;
y = (nav) ? e.pageY : event.clientY+document.body.scrollTop;
x += x_offset;
y += y_offset;
beam(1);
}
function beam(n)
{
if(n<5)
{
if(nav)
{
eval("document.div"+n+".top="+y);
eval("document.div"+n+".left="+x);
eval("document.div"+n+".visibility=\'visible\'");
}
else
{
eval("div"+n+".style.top="+y);
eval("div"+n+".style.left="+x);
eval("div"+n+".style.visibility=\'visible\'");
}
n++;
tmr=setTimeout("beam("+n+")",spd);
}
else
{
clearTimeout(tmr);
fade(4);
}
}
function fade(n)
{
if(n>0)
{
if(nav)eval("document.div"+n+".visibility=\'hidden\'");
else eval("div"+n+".style.visibility=\'hidden\'");
n--;
tmr=setTimeout("fade("+n+")",spd);
}
else clearTimeout(tmr);
}
// -->
</script>
</body>
<STYLE TYPE="text/css">
<!--
BODY{
overflow:scroll;
overflow-x:hidden;
}
.s1
{
position : absolute;
font-size : 12pt;
color : blue;
visibility: hidden;
}
.s2
{
position : absolute;
font-size : 20pt;
color : red;
visibility : hidden;
}
.s3
{
position : absolute;
font-size : 16pt;
color : gold;
visibility : hidden;
}
.s4
{
position : absolute;
font-size : 14pt;
color : lime;
visibility : hidden;
}
-->
</STYLE>
====2、将以下代码加入HTML的<body></body>之间：
<DIV ID="div1" CLASS="s1">*</DIV>
<DIV ID="div2" CLASS="s2">*</DIV>
<DIV ID="div3" CLASS="s3">*</DIV>
<DIV ID="div4" CLASS="s4">*</DIV>
<script language="javascript" type="text/javascript" class="s5">
var nav = (document.layers);
var tmr = null;
var spd = 50;
var x = 0;
var x_offset = 5;
var y = 0;
var y_offset = 15;
if(nav) document.captureEvents(Event.MOUSEMOVE);
document.onmousemove = get_mouse;
function get_mouse(e)
{
x = (nav) ? e.pageX : event.clientX+document.body.scrollLeft;
y = (nav) ? e.pageY : event.clientY+document.body.scrollTop;
x += x_offset;
y += y_offset;
beam(1);
}
function beam(n)
{
if(n<5)
{
if(nav)
{
eval("document.div"+n+".top="+y);
eval("document.div"+n+".left="+x);
eval("document.div"+n+".visibility=\'visible\'");
}
else
{
eval("div"+n+".style.top="+y);
eval("div"+n+".style.left="+x);
eval("div"+n+".style.visibility=\'visible\'");
}
n++;
tmr=setTimeout("beam("+n+")",spd);
}
else
{
clearTimeout(tmr);
fade(4);
}
}
function fade(n)
{
if(n>0)
{
if(nav)eval("document.div"+n+".visibility=\'hidden\'");
else eval("div"+n+".style.visibility=\'hidden\'");
n--;
tmr=setTimeout("fade("+n+")",spd);
}
else clearTimeout(tmr);
}
// -->
</script>
</body>
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