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 //prompt window.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>n"; strHtml += " <li>" + title + "</li>n"; strHtml += " <li>" + str + "</li>n"; strHtml += " <li><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>

以上就是小编为大家带来的浅谈javascript中的三种弹窗全部内容了，希望大家多多支持查字典教程网~