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渐变的Alert

发布：dxy 发布日期：2006-11-4 字体：[增加减小] 类型：转载

点击运行可以看到效果:

<!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 
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abc 
abc 
abc 
abc 
abc 
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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>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

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