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<!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{width: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