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";?
//彈出對話框時(shí)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;\">[自定義提示]</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 #F9CADE;\"><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;};?
}