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  • 如何更改alert提示框的样式 如何改变提示框的背景颜色,字体,大小位置

    window.alert = function(str) 

    var shield = document.createElement("DIV"); 
    shield.id = "shield"; 
    shield.style.position = "absolute"; 
    shield.style.left = "0px"; 
    shield.style.top = "0px"; 
    shield.style.width = "100%"; 
    shield.style.height = document.body.scrollHeight+"px"; 
    //弹出对话框时的背景颜色 
    shield.style.background = "#fff"; 
    shield.style.textAlign = "center"; 
    shield.style.zIndex = "25"; 
    //背景透明 IE有效 
    //shield.style.filter = "alpha(opacity=0)"; 
    var alertFram = document.createElement("DIV"); 
    alertFram.id="alertFram"; 
    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 = "#ff0000"; 
    alertFram.style.textAlign = "center"; 
    alertFram.style.lineHeight = "150px"; 
    alertFram.style.zIndex = "300"; 
    strHtml = "<ul style="list-style:none;margin:0px;padding:0px;100%"> "; 
    strHtml += " <li style="background:#DD828D;text-align:left;padding-left:20px;font-size:14px;font-weight:bold;height:25px;line-height:25px;border:1px solid #F9CADE;">[自定义提示]</li> "; 
    strHtml += " <li style="background:#fff;text-align:center;font-size:12px;height:120px;line-height:120px;border-left:1px solid #F9CADE;border-right:1px solid #F9CADE;">"+str+"</li> "; 
    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> "; 
    strHtml += "</ul> "; 
    alertFram.innerHTML = strHtml; 
    document.body.appendChild(alertFram); 
    document.body.appendChild(shield); 
    var ad = setInterval("doAlpha()",5); 
    this.doOk = function(){ 
    alertFram.style.display = "none"; 
    shield.style.display = "none"; 

    alertFram.focus(); 
    document.body.onselectstart = function(){return false;}; 
    }

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  • 原文地址:https://www.cnblogs.com/codepen2010/p/6894696.html
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