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整天对着灰色的confirm和alert对话框，厌恶了，今天要彻底地改变一下这两个对话框，且功能照旧。
这里是使用js来实现这个效果
<html>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=gb2312″ />
<title>js模拟confirm和alert功能</title>
<script>
/*
************************************
功能：js模拟confirm、alert效果，改变
它们原始那些灰色的样子
来源：网络
整理:www.aspprogram.cn
************************************
*/
function clk_yes()
{
alert(“这是confirm效果”);
}
function clk_no()
{
alert(“这不是confirm效果”);
}
var alternateFrame=null;//生成的iframe
var alternateWin=null;
window.alert=showAlert;
window.confirm=showConfirm;
var IsIE=document.all;
function alternateWindow(){
this.win=null;//生成对话框的窗口对象
this.pBody=null;//生成的body容器对象
this.pBg=null;
this.type=”alert”;//默认的种类是alert
this.FocusWhere=”OK”;//焦点在哪个按钮上
}
function showAlert(info){
alternateWin=new alternateWindow();
var pBody = alternateWin.init();
alternateWin.initAlertBody(pBody,info);
alternateWin.type=”alert”;
}
function showConfirm(info,ok_func,notok_func,ok_str,not_okstr){
alternateWin=new alternateWindow();
var pBody = alternateWin.init();
alternateWin.initConfirmBody(pBody,info,ok_func,notok_func,ok_str,not_okstr);
alternateWin.type=”confirm”;
}
alternateWindow.prototype.init=function() {
if(alternateFrame==null){
/*alternateFrame=document.createElement(“<iframe allowTransparency=’true’ id=’popframe’ “
+”frameborder=0 marginheight=0 src=’about:blank’ marginwidth=0 hspace=0 vspace=0 scrolling=no></iframe>”)*/
//上面的ff不能兼容
alternateFrame=document.createElement(“iframe”);
//alternateFrame.allowTransparency=’true’;//这个没有什么用啊………..
alternateFrame.id=’popframe’;
alternateFrame.frameborder=0;
alternateFrame.marginheight=0;
alternateFrame.vspace=0;
alternateFrame.hspace=0;
alternateFrame.scrolling=”no”;
alternateFrame.src=’about:blank’;
alternateFrame.style.position=”absolute”;
document.body.appendChild(alternateFrame);
}else{
alternateFrame.style.visibility=”visible”;
}
//ff设置位置时要把单位加上
alternateFrame.style.width=screen.availWidth+”px”;
alternateFrame.style.height=screen.availHeight+”px”;
alternateFrame.style.left=document.body.scrollLeft+”px”;
alternateFrame.style.top=document.body.scrollTop+”px”;
//alternateFrame.name=alternateFrame.uniqueID;//ff下iframe不支持uniqueID属性
alternateFrame.name=”popframe”;
//this.win=window.frames[alternateFrame.name];//=========
this.win=IsIE?window.frames[alternateFrame.name]:document.getElementById(“popframe”).contentWindow;
this.win.document.write(“<body leftmargin=0 topmargin=0 oncontextmenu=’self.event.returnValue=false’><div id=popbg></div><div id=popbody></div><div></div></body>”);
this.win.document.body.style.backgroundColor=”transparent”;
document.body.style.overflow=”hidden”;
//=============下面两句
this.pBody=IsIE?this.win.document.body.children[1]:this.win.document.getElementById(“popbody”);
this.pBg=IsIE?this.win.document.body.children[0]:this.win.document.getElementById(“popbg”);
this.hideAllSelect();
this.initBg();
return this.pBody;
}
/**
* 作用：初始化背景层
*/
//=============ff的滤镜播放效果的支持知道怎么搞
alternateWindow.prototype.initBg=function(){
with(this.pBg.style){
position=”absolute”;
left=”0″;
top=”0″;
width=”100%”;
height=”100%”;
visibility=”hidden”;
backgroundColor=”#000000″;
if(IsIE)
filter=”blendTrans(duration=1) alpha(opacity=30)”;//==========
else//ff下的blendTrans滤镜好象不支持，反正是不知道了
opacity=”0.3″;//透明度这样设置，是ff时
}
if(IsIE) this.pBg.filters.blendTrans.apply();
this.pBg.style.visibility=”visible”;
if(IsIE) this.pBg.filters.blendTrans.play();
}
/**
* 作用：初始化显示层
*/
alternateWindow.prototype.initAlertBody=function(obj,info){
with(obj.style){
position=”absolute”;
width=”400″;
height=”150″;
backgroundColor=”#ffffff”;
}
obj.style.left=window.document.body.clientWidth/2-200;
obj.style.top=window.document.body.clientHeight/10;
var str;
str =”<table border=0 cellpadding=0 cellspacing=1 bgcolor=#00ff00 width=100% height=100%><tr height=30>”;
str+=”<td align=left style=’color:#e1dfdf;font-size:14px;font-weight:bold’ bgcolor=#119035>【新闻详细】<span id=newstitle></span></td></tr>”;
str+=”<tr><td align=center bgcolor=#81FB8D style=’font-size:12px;color:#454545;vertical-align: top;padding-top:5px;’>”;
str+=info+”</td></tr><tr height=40 bgcolor=#81FB8D><td align=center>” +
“<input type=’button’ value=’关 闭’ id=’AlertOK'” +//这里id要注意唯一
” onkeydown=’parent.alternateWin.onKeyDown(event,this)'”+
” onclick=’parent.alternateWin.closeWin()’ style=’border:solid 1px #797979;background:#f8f8f8;width:80px; padding:3px;’>” +
“</td></tr></table>”;
obj.innerHTML=str;
//这句话有问题，ff不支持all
if(IsIE)this.win.document.body.all.AlertOK.focus();else this.win.document.getElementById(“AlertOK”);
this.FocusWhere=”OK”;
}
alternateWindow.prototype.onKeyDown=function(event,obj){
switch(event.keyCode){
case 9://tab键
//这里事件对象属性和方法使用没加与区别
if(IsIE) event.keyCode=-1;else event.preventDefault();
if(this.type==”confirm”){
if(this.FocusWhere==”OK”){
if(IsIE)
this.win.document.body.all.ConfirmNO.focus();
else
this.win.document.getElementById(“ConfirmNo”).focus();
this.FocusWhere=”NO”;
}else{
if(IsIE)this.win.document.body.all.ConfirmOK.focus();else this.win.document.getElementById(“ConfirmOK”).focus();
this.FocusWhere=”OK”;
}
}
break;
case 13:obj.click();break;
case 27:this.closeWin();break;
}
}
/**
* 作用：初始化显示层 conFirm提示层
*/
alternateWindow.prototype.initConfirmBody=function(obj,info,ok_func,notok_func,ok_str,notok_str){
with(obj.style){
position=”absolute”;
width=”400″;
height=”150″;
backgroundColor=”#ffffff”;
}
if(ok_str==null){
ok_str=”确定”;
}
if(notok_str==null){
notok_str=”取消”
}
obj.style.left=window.document.body.clientWidth/2-200;
obj.style.top=window.document.body.clientHeight/3;
var str;
str=”<table border=0 cellpadding=0 cellspacing=1 bgcolor=#81FB8D width=100% height=100%><tr height=30>”;
str+=”<td align=left style=’color:#000000;font-size:14px;font-weight:bold’ bgcolor=#119035>[询问]</td></tr>”;
str+=”<tr><td align=center bgcolor=#81FB8D style=’font-size:12px;color:#000000;vertical-align: middle;’>”;
str+=info+”</td></tr><tr height=30 bgcolor=#81FB8D><td align=center>” +
“<input type=’button’ id=’ConfirmOK'” +//这里id要注意唯一
” onkeydown=’parent.alternateWin.onKeyDown(event,this)'”+
” onclick=’parent.alternateWin.closeWin();parent.”+ok_func+”();’ ” +
” value='”+ok_str+”‘ style=’border:solid 1px #666666;background:#81FB8D’>”+
“ <input type=’button’ value='”+notok_str+”‘ id=’ConfirmNO'”+//这里id要注意唯一
” onkeydown=’parent.alternateWin.onKeyDown(event,this)'”+
” onclick=’parent.alternateWin.closeWin();” +
” parent.”+notok_func+”();’ style=’border:solid 1px #666666;background:#81FB8D’></td></tr></table>”;
obj.innerHTML=str;
if(IsIE)this.win.document.body.all.ConfirmOK.focus();else this.win.document.getElementById(“ConfirmOK”).focus();
}
/**
* 作用：关闭一切
*/
alternateWindow.prototype.closeWin=function(){
alternateFrame.style.visibility=”hidden”;
this.showAllSelect();
document.body.style.overflow=”auto”;
}
/**
* 作用:隐藏所有的select
*/
alternateWindow.prototype.hideAllSelect=function(){
var obj;
obj=document.getElementsByTagName(“SELECT”);
var i;
for(i=0;i<obj.length;i++)
obj[i].style.visibility=”hidden”;
}
/**
* 显示所有的select
*/
alternateWindow.prototype.showAllSelect=function(){
var obj;
obj=document.getElementsByTagName(“SELECT”);
var i;
for(i=0;i<obj.length;i++)
obj[i].style.visibility=”visible”;
}
</script>
</head>
<body>
<h1>点击下面两个按纽进行测试</h1><br />
<input name=”” type=”submit” value=”confirm效果” onclick=”return confirm(‘这是confirm效果吗？’,’clk_yes’,’clk_no’,’是的’,’不是’);” />
<input type=”button” value=”alert效果” onclick=”return alert(‘alert效果’);”>
</html>
