渐变的Alert

时间：2021-03-24 10:30:52|栏目：JavaScript代码|点击：次

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="gb2312" > <head> <meta http-equiv="content-type" content="text/html; charset=gb2312" /> <meta name="author" content="Smiling Dolphin" /> <meta name="keywords" content="design, css, cascading, style, sheets, xhtml, graphic design, w3c, web standards, visual, display, java, javascript, c++, php, jsp, asp, py, pl" /> <meta name="description" content="my favorites language." /> <meta name="robots" content="all" /> <title>Dolphin Document</title> </head> <body> <input type="button" value="显示Alert" onclick="alert('我改写了Alert显示的样式')" /> abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc <script language="javascript" type="text/javascript"> window.alert = function(txt) { //document.write(txt); var shield = document.createElement("DIV"); shield.style.position = "absolute"; shield.style.left = "0px"; // shield.id = "shield"; shield.style.top = "0px"; shield.style.width = "100%"; shield.style.height = document.body.clientHeight+"px"; shield.style.background = "#333"; shield.style.textAlign = "center"; // shield.style.lineHeight = document.body.clientHeight+"px"; shield.style.zIndex = "1"; shield.style.filter = "alpha(opacity=0)"; var alertFram = document.createElement("DIV"); alertFram.style.position = "absolute"; alertFram.style.left = "50%"; alertFram.style.top = "50%"; alertFram.style.marginLeft = "-225px"; alertFram.style.marginTop = "-75px"; alertFram.style.width = "450px"; alertFram.style.height = "150px"; alertFram.style.background = "#ccc"; alertFram.style.textAlign = "center"; alertFram.style.lineHeight = "150px"; alertFram.style.zIndex = "2"; strHtml = "<ul style=\"list-style:none;margin:0px;padding:0px;width:100%\">\n"; strHtml += " <li style=\"background:#DD828D;text-align:left;padding-left:20px;font-weight:bold;height:25px;line-height:25px;border:1px solid #F9CADE;\">[系统提示]</li>\n"; strHtml += " <li style=\"background:#fff;text-align:center;font-weight:bold;height:120px;line-height:120px;border-left:1px solid #F9CADE;border-right:1px solid #F9CADE;\">"+txt+"</li>\n"; strHtml += " <li style=\"background:#FDEEF4;text-align:center;font-weight:bold;height:25px;line-height:25px; border:1px solid #F9CADE;\"><input type=\"button\" value=\"确 定\" onclick=\"doOk()\" /></li>\n"; strHtml += "</ul>\n"; alertFram.innerHTML = strHtml; document.body.appendChild(alertFram); document.body.appendChild(shield); var c = 0; this.doAlpha = function(){ if (c++ > 10){clearInterval(ad);return 0;} shield.style.filter = "alpha(opacity="+c+");"; } var ad = setInterval("doAlpha()",20); this.doOk = function(){ alertFram.style.display = "none"; shield.style.display = "none"; } } </script> </body> </html>

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