html5 javascript 事件练习2
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js练习-变化的颜色</title>
<style type="text/css">
/*#div1{
background: orange;
width: 200px;
height: 200px;
padding: 15px;
border-radius: 200px;
position: absolute;
}*/
</style>
</head>
<body>
<!-- <div id="div1"></div> -->
<script>
// var dd=document.getElementById('div1');
// function movehouzi(e){
// var sy=document.documentElement.scrollTop||document.body.scrollTop
// dd.style.left=e.clientX+'px';
// dd.style.top=e.clientY+sy+'px';
//}
// document.onmousemove=movehouzi;
function houzimove(e){
var num=30;
var divs=document.getElementsByTagName('div');
var body=document.getElementsByTagName('body')[0];
for (var i = 0; i < num; i++) {
var rad=Math.floor(Math.random()*10)+'px';
divs[i]=document.createElement('div');
divs[i].style.background='rgb('+4*i+','+2*i+','+i+')';
divs[i].style.width=divs[i].style.height=rad;
divs[i].style.position='absolute';
divs[0].style.left=e.clientX+'px';
divs[0].style.top=e.clientY+'px';
divs[i].style.left=e.clientX+Math.floor(Math.random()*10*i)+'px';
divs[i].style.top=e.clientY+Math.floor(Math.random()*10*i)+'px';
body.appendChild(divs[i]);
}
}
document.onmousemove=houzimove;
</script>
</body>
</html>