改良后的《js鼠标点符号击位置 弹出层由中心向四周缓慢扩大》
<html>
<head>
<title>无标题文档</title>
<script language="javascript">
var level = 1;
var div ;
var timeout ;
document.onclick = function (event){
var e = event || window.event ;
div = document.getElementById('mydiv');
level = 1;
if(level === 1){
div.style.marginLeft = e.clientX;
div.style.marginTop = e.clientY;
div.style.width = '0px';
div.style.height = '0px';
clearTimeout(timeout);
}
var step = function (){
var width = parseInt(div.style.width.substring(0,div.style.width.length -2)) ;
var height = parseInt(div.style.height.substring(0,div.style.height.length -2));
var left = parseInt(div.style.marginLeft.substring(0,div.style.marginLeft.length-2));
var top = parseInt(div.style.marginTop.substring(0,div.style.marginTop.length-2));
div.style.width = (width + 4 ) + 'px';
div.style.height = (height + 2 ) + 'px';
div.style.marginLeft = (left - (width+4) /2 +width/2) + 'px';
div.style.marginTop = (top - (height+2)/2 +height/2) + 'px';
if(level <= 50){
level = level +1 ;
timeout= setTimeout(step,10);
}
}
timeout = setTimeout(step,10);
}
</script>
</head>
<body>
<div id="mydiv" style="background-color:#99FF00;width:0px;height:0px; position:absolute;"></div>
</body>
</html>