浅谈javascript中的三种弹窗

2019-11-20 08:41:54

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js中三种弹窗

1）alert 弹出警告无返回值－－－－－－－－－alert('第一行/n第二行');

2）confirm()选择确定或取消，返回t或f－－－－var result = confirm('是否删除！');

3）prompt()弹出输入框，返回输入内容－－－－var value = prompt('输入你的名字：', '请在这里输入名字');

当然也可以自定义好看的样式。下面代码有问题明天再改。

<script>//window.confirm//promptwindow.alert = function(title,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;width:100%/">/n"; 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;/">" + title + "</li>/n"; 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>/n"; strHtml += " <li style=/"background:#FDEEF4;text-align:center;font-weight:bold;height:25px;line-height:25px; border:1px solid #e85727;/"><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 ad = setInterval("doAlpha()",5); this.doOk = function(){ alertFram.style.display = "none"; shield.style.display = "none"; } alertFram.focus(); document.body.onselectstart = function(){return false;}; }</script>

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