淺談javascript中的三種彈窗

更新時間：2016年10月21日 08:38:36 投稿：jingxian

下面小編就為大家?guī)硪黄獪\談javascript中的三種彈窗。小編覺得挺不錯的，現(xiàn)在就分享給大家，也給大家做個參考。一起跟隨小編過來看看吧

js中三種彈窗

1）alert 彈出警告無返回值－－－－－－－－－alert('第一行\(zhòng)n第二行');

2）confirm()選擇確定或取消，返回t或f－－－－var result = confirm('是否刪除！');

3）prompt()彈出輸入框，返回輸入內(nèi)容－－－－var value = prompt('輸入你的名字：', '請在這里輸入名字');

當(dāng)然也可以自定義好看的樣式。下面代碼有問題明天再改。

<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"; 
//彈出對話框時的背景顏色 
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=\"確 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>

以上就是小編為大家?guī)淼臏\談javascript中的三種彈窗全部內(nèi)容了，希望大家多多支持腳本之家~

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