复制代码 代码如下:
<script type="text/javascript">
var ball;
var mouseX = 100;
var mouseY = 100;
var angle = 0;
var radius = 0;
function draw(){
ball = document.createElement("span");
ball.style.position = "absolute";
ball.style.color = "#FF0000";
ball.style.zIndex = 999999999;
ball.innerHTML = "●";
document.body.appendChild(ball);
ball.style["left"] = mouseX+ "px";
ball.style["top"] = mouseY+ "px";
}
function MousePos(e)
{
e = e || window.event;
var x,y;
if(!document.all){
x = e.pageX;
y = e.pageY;
}
else{
x = event.clientX + document.documentElement.scrollLeft;
y = event.clientY + document.documentElement.scrollTop;
}
return {x:x,y:y};
}
function setXY(e)
{
e = e || window.event;
var pos = MousePos(e);
mouseX = pos.x;
mouseY = pos.y;
draw();
}
window.onload = function(){
document.documentElement.onmousemove = function(e){
e = e || window.event;
setXY(e);
};
}
</script>
效果演示代码:
[Ctrl+A 全选 注:引入外部Js需再刷新一下页面才能执行]
出处:http://www.cnblogs.com/airy
<script type="text/javascript">
var ball;
var mouseX = 100;
var mouseY = 100;
var angle = 0;
var radius = 0;
function draw(){
ball = document.createElement("span");
ball.style.position = "absolute";
ball.style.color = "#FF0000";
ball.style.zIndex = 999999999;
ball.innerHTML = "●";
document.body.appendChild(ball);
ball.style["left"] = mouseX+ "px";
ball.style["top"] = mouseY+ "px";
}
function MousePos(e)
{
e = e || window.event;
var x,y;
if(!document.all){
x = e.pageX;
y = e.pageY;
}
else{
x = event.clientX + document.documentElement.scrollLeft;
y = event.clientY + document.documentElement.scrollTop;
}
return {x:x,y:y};
}
function setXY(e)
{
e = e || window.event;
var pos = MousePos(e);
mouseX = pos.x;
mouseY = pos.y;
draw();
}
window.onload = function(){
document.documentElement.onmousemove = function(e){
e = e || window.event;
setXY(e);
};
}
</script>
效果演示代码:
[Ctrl+A 全选 注:引入外部Js需再刷新一下页面才能执行]
出处:http://www.cnblogs.com/airy
标签:
白板
免责声明:本站文章均来自网站采集或用户投稿,网站不提供任何软件下载或自行开发的软件!
如有用户或公司发现本站内容信息存在侵权行为,请邮件告知! 858582#qq.com
狼山资源网 Copyright www.pvsay.com
暂无“javascript实现的白板效果(可以直接在网页上写字)”评论...
RTX 5090要首发 性能要翻倍!三星展示GDDR7显存
三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。
首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。
据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。