本脚本中被放大的文本在网页中的位置必须是绝对定位，演示程序中把文本定在了网页的中间，实用价值一般
查看演示页面 View Demo 查看全部代码 View Code
第一步：
在<head>区添加以下代码
<style type="text/css">
body {cursor:crosshair;margin:0; padding:0; position:absolute; overflow:hidden; background:#000; left:0; top:0; width:100%; height:100%;}
span {position:absolute;font-family: verdana; font-weight: bold;}
</style>
<script type="text/javascript"><!--
/*****************************************************
* Share JavaScript (http://www.ShareJS.com)
* 使用此脚本程序，请保留此声明
* 获取此脚本以及更多的JavaScript程序，请访问 http://www.ShareJS.com
******************************************************/
T = "sharejs.com . What is real?How do you define real? Ifyou're talkingabout what youcan feel whatyou can smellwhat you cantaste and seethen real issimply electrical signalsinterpreted byyour brain! ";
I = 0;
o = new Array();
xm = -1000;
ym = -1000;
///////////////
rad = 80;
dim = 200;
///////////////
W = 0;
H = 0;
NX = 14;
NY = 14;
var nx;
var ny;
document.onmousemove = function(e){
if (window.event) e = window.event;
xm = (e.x || e.clientX) - (nx * .5) + dim * .5;
ym = (e.y || e.clientY) - (ny * .5) + dim * .5;
}
function resize() {
nx = document.body.offsetWidth;
ny = document.body.offsetHeight;
}
onresize = resize;
function CObj(N,i,j,c){
this.obj = document.createElement("span");
this.obj.innerHTML = c;
DOOT.appendChild(this.obj);
this.N = N;
this.To = 16;
this.x0 = i*2*W;
this.y0 = j*2*H;
this.anim = true;
this.mainloop = function(){
with (this) {
dx = xm - x0;
dy = ym - y0;
dist = Math.sqrt(dx * dx + dy * dy);
if (dist < rad) {
anim = true;
M = Math.cos(.5 * Math.PI * Math.abs(dist / rad));
c = Math.round(84 + M * 171);
with(obj.style){
left = x0 - dx * M;
top = y0 - dy * M;
zIndex = Math.round(100 + M);
fontSize = 8 + M * W * 2;
color = "RGB("+c+","+c+","+c+")";
}
} else {
if(anim){
with(obj.style){
left = x0;
top = y0;
zIndex = 0;
fontSize = 8;
color = "RGB(88,88,88)";
}
anim = false;
}
}
}
}
}
function run(){
for(i in o)o[i].mainloop();
setTimeout(run,16);
}
onload = function (){
DOOT = document.getElementById("doot");
with(DOOT.style){
left = -dim/2;
top = -dim/2;
width = dim;
height = dim;
}
resize();
W = (dim / NX) / 2;
H = (dim / NY) / 2;
K = 0;
for(var j=0;j<NY;j++){
for(var i=0;i<NX;i++){
c=T.charAt((I++)%T.length).toUpperCase();
if(c==" ")c="·";
o[K] = new CObj(K++,i,j,c);
}
}
run();
}
//-->
</script>
</head>
第二步：
在<body>区添加以下代码
<span style="position:absolute;left:50%;top:50%"> <span id="doot"></span> </span>
标签的样式表明是绝对定位
