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javascript背景淡入淡出
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <style type="text/css"> #div1 { width: 200px; height: 200px; background-color: green; filter: alpha(opacity=20); opacity: 0.2; } </style> <script type="text/javascript"> var alpha = 30; var timer = null; window.onload = function () { var oDiv = document.getElementById("div1"); oDiv.onmouseover = function () { Move(100); } oDiv.onmouseout = function () { Move(30); } } function Move(iTarget) { var speed = 0; clearInterval(timer); var oDiv = document.getElementById("div1"); timer = setInterval(function () { if (alpha < iTarget) { speed = -3; } else if (alpha == iTarget) { speed = 3; } //开始变色 if (alpha == iTarget) { clearInterval(timer); } else { alpha += speed; oDiv.style.filter = ‘alpha(opacity=‘ + alpha + ‘)‘; oDiv.style.opacity = alpha / 100; } }, 30); } </script></head><body> <div id="div1"> </div></body></html>
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