在你的网页中加入下雨的效果

<style> a:hover{color:#036;} </style> <script language="javascript"> var rates = 20; var 对象； var 行为 = 0; var elmH = 0; var elmS = 128; var elmV = 255; var clrOrg; var 定时器ID； if (navigator.appName.indexOf("Microsoft",0) != -1 && parseInt(navigator.appVersion) >= 4) { 浏览器 = true; } else { 浏览器= false; } if (浏览器) { document.onmouseover = doRainbowAnchor; document.onmouseout = stopRainbowAnchor; } function doRainbow() { if (浏览器 && act != 1) { act = 1; obj = event.srcElement; clrOrg = obj.style.color; TimerID = setInterval("ChangeColor()",100); } } function stopRainbow() { if (Browser && act != 0) { obj.style.color = clrOrg;清除间隔（定时器ID）；行动=0； } } function doRainbowAnchor() { if (Browser && act != 1) { obj = event.srcElement; while (obj.tagName != 'A' && obj.tagName != 'BODY') { obj = obj.parentElement; if (obj.tagName == 'A' || obj.tagName == 'BODY') 中断; } if (obj.tagName == 'A' && obj.href != '') { act = 1; clrOrg = obj.style.color; TimerID = setInterval("ChangeColor()",100); } } } function stopRainbowAnchor() { if (Browser && act != 0) { if (obj.tagName == 'A') { obj.style.color = clrOrg;清除间隔（定时器ID）；行动=0； } } } function ChangeColor() { obj.style.color = makeColor(); } 函数 makeColor() { if (elmS == 0) { elmR = elmV; elmG = elmV； elmB = elmV； } 否则 { t1 = elmV; t2 = (255 - elmS) * elmV / 255; t3 = elmH % 60; t3 = (t1 - t2) * t3 / 60;如果 (elmH < 60) { elmR = t1; elmB = t2; elmG = t2 + t3; } 否则如果 (elmH < 120) { elmG = t1; elmB = t2; elmR = t1 - t3； } 否则如果 (elmH < 180) { elmG = t1; elmR = t2; elmB = t2 + t3; } 否则如果 (elmH < 240) { elmB = t1; elmR = t2; elmG = t1 - t3； } 否则如果 (elmH < 300) { elmB = t1; elmG = t2; elmR = t2 + t3; } 否则如果 (elmH < 360) { elmR = t1; elmG = t2; elmB = t1 - t3； } 否则 { elmR = 0; elmG = 0; elmB = 0; elmR = Math.floor(elmR); elmG = Math.floor(elmG); elmB = Math.floor(elmB); clrRGB = '#' + elmR.toString(16) + elmG.toString(16) + elmB.toString(16); elmH = elmH + 速率；如果 (elmH >= 360) elmH = 0;返回 clrRGB； } </script><div> <a href="##">鼠标移到这里观看效果</a> </div>