<!DOCTYPE HTML>
<html lang="zh-cn">
<head>
<meta charset="utf-8" />
<meta http-equiv="Content-Language" content="zh-cn" />
<title>事件对象-通过键盘控制div运动</title>
<meta name="keywords" content="" />
<meta name="description" content="" />
<style type="text/css">
*{margin: 0px; padding: 0px; font-size:14px; font-family:'微软雅黑';}
.clearfix:after{content:'.';display:block;height:0;clear:both;visibility:hidden}
.clearfix{display:inline-block;}
* html .clearfix{height:1%}
.clearfix{display:black;}
#box{100px;height:100px;background:red;position:absolute;}
</style>
</head>
<body>
<div id='box'></div>
</body>
<script type="text/javascript">
window.onload=function(){
var oDiv =document.getElementById('box');
document.onkeydown = function(ev){
var Event = ev||event;
var L = oDiv.offsetLeft;
var T = oDiv.offsetTop;
//alert(Event.keyCode);
//←37↑38→39↓40
if(Event.keyCode==37){
if(L<=0){
L = 0;
}else{
oDiv.style.left = oDiv.offsetLeft-10+'px';
}
}else if(Event.keyCode==38){
if(T<=0){
L=0;
}else{
oDiv.style.top = oDiv.offsetTop-10+'px';
}
}else if(Event.keyCode==39){
if(L>=document.documentElement.clientWidth-oDiv.offsetWidth){
L=document.documentElement.clientWidth-oDiv.offsetWidth;
}else{
oDiv.style.left = oDiv.offsetLeft+10+'px';
}
}else if(Event.keyCode==40){
if(T>=document.documentElement.clientHeight-oDiv.offsetHeight){
T=document.documentElement.clientHeight-oDiv.offsetHeight;
}else{
oDiv.style.top = oDiv.offsetTop+10+'px';
}
}
}
}
</script>
</html>
鼠标事件:
clientX 是可视区的横坐标
clientY 是可视区的纵坐标
var scrollTop=document.documentElement.scrollTop||document.body.scrollTop;
var scrollLeft = document.documentElement.scrollLeft||document.body.scrollLeft;
document.documentElement.clinetWidth 可视区的宽
document.documentElement.clinetHeight 可视区的高
键盘事件
onkeydown
onkeyup
keyCode-检测鼠标数字
Event = ev||event;
Event.keyCode 用法