javascript自定义alert弹窗

我们都知道js中的alert有弹窗提示的作用,但它在实践项目中很少使用,原因就是因为长的太难看!那么今天我就给大家讲一下如何来美化这个系统自带的alert!详细代码如下:

<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<title>教你如何更改网页的默认alert弹窗</title>
</head>
<body>
<!-- 更改系统默认弹窗 -->
<script type="text/javascript"> window.alert = function(str) { var shield = document.createElement("DIV"); shield.id = "shield"; shield.style.position = "absolute"; shield.style.left = "50%"; shield.style.top = "50%"; shield.style.width = "280px"; shield.style.height = "150px"; shield.style.marginLeft = "-140px"; shield.style.marginTop = "-110px"; shield.style.zIndex = "25"; var alertFram = document.createElement("DIV"); alertFram.id="alertFram"; alertFram.style.position = "absolute"; alertFram.style.width = "280px"; alertFram.style.height = "150px"; alertFram.style.left = "50%"; alertFram.style.top = "50%"; alertFram.style.marginLeft = "-140px"; alertFram.style.marginTop = "-110px"; alertFram.style.textAlign = "center"; alertFram.style.lineHeight = "150px"; alertFram.style.zIndex = "300"; strHtml = "<ul style=\"list-style:none;margin:0px;padding:0px;width:100%\">\n"; strHtml += " <li style=\"background:#626262;text-align:left;padding-left:20px;font-size:14px;font-weight:bold;height:25px;line-height:25px;border:1px solid #F9CADE;color:white\">[自定义alert]</li>\n"; strHtml += " <li style=\"background:#787878;text-align:center;font-size:12px;height:95px;line-height:95px;border-left:1px solid #F9CADE;border-right:1px solid #F9CADE;color:#DCC722\">"+str+"</li>\n"; strHtml += " <li style=\"background:#626262;text-align:center;font-weight:bold;height:30px;line-height:25px; border:1px solid #F9CADE;\"><input type=\"button\" value=\"确 定\" onclick=\"doOk()\" style=\"width:80px;height:20px;background:#626262;color:white;border:1px solid white;font-size:14px;line-height:20px;outline:none;margin-top: 4px\"/></li>\n"; strHtml += "</ul>\n"; alertFram.innerHTML = strHtml; document.body.appendChild(alertFram); document.body.appendChild(shield); this.doOk = function(){ alertFram.style.display = "none"; shield.style.display = "none"; } alertFram.focus(); document.body.onselectstart = function(){return false;}; } </script>
<script> // 测试 alert alert('自定义弹窗'); </script>
</body>
</html>


原文地址:http://www.xttblog.com/?p=361

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