1. 淡入淡出效果js原生代码
html部分：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style type="text/css"> #div1{width:200px; height:200px; background:red; filter:alpha(opacity:30); opacity:0.3} </style> </head> <body> <div id="div1"></div> </body> </html>
js部分：
<script type="text/javascript"> window.onload=function(){ var oDiv=document.getElementById('div1'); oDiv.onmouseover=function(){ startMove(100); } oDiv.onmouseout=function(){ startMove(30); } } var alpha=30; var timer=null; function startMove(iTarget){ var oDiv=document.getElementById('div1'); clearInterval(timer); timer=setInterval(function(){ var speed=0; if(alpha<iTarget){ speed=10; } else{ speed=-10 } if(alpha==iTarget){ clearInterval(timer); } else{ alpha+=speed; oDiv.style.filter='alpha(opacity:'+alpha+')'; oDiv.style.opacity=alpha/100; } },30); } </script>
2.缓冲运动
效果图：
功能：div的移动速度与div和右边黑线的距离成正比。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style type="text/css"> #div1{ width:100px; height:100px; background:red; position:absolute; left:0px; top:50px;} #div2{ width:1px; height:300px; position:absolute; top:0px; left:300px; background:#000;} </style> <script type="text/javascript"> function startMove(){ var oDiv=document.getElementById('div1'); setInterval(function(){ var speed=(300-oDiv.offsetLeft)/10; //speed=Math.ceil(speed); speed=speed>0?Math.ceil(speed):Math.floor(speed); oDiv.style.left=oDiv.offsetLeft+speed+'px'; },30); } </script> </head> <body> <input type="button" value="开始运动" onclick="startMove()"/> <div id="div1"></div> <div id="div2"></div> </body> </html>