弹出div不能正常显示

Question

  我看了一个通宵都没有看出错误的代码，有谁帮帮我呀？
  代码如下：
    function divshow()
    {
     
         if(document.getElementById("divFunction").style.display=="none")
         {
            //alert("asdfadsfasd");
            document.getElementById("divFunction").style.display="block";
            document.getElementById("divFunction1").style.display="block";
            document.getElementById("divFunction0").style.display="block";          
            //让弹出层在页面中垂直左右居中
        //var arrayPageSize = getPageSize();
        //var arrayPageScroll = getPageScroll();
        //alert(arrayPageScroll);
        //alert(arrayPageSize);
        
        document.getElementById("divFunction").style.width = "100%";
        //document.getElementById("divFunction").style.height = "5000" + "px";
        document.getElementById("divFunction").style.height = "100%";
        document.getElementById("divFunction").style.zIndex = "998";
        document.getElementById("divFunction").style.position = "absolute";
        document.getElementById("divFunction").style.top = "0";
        document.getElementById("divFunction").style.left = "0";
        document.getElementById("divFunction").style.filter = "alpha(opacity=10)";
        document.getElementById("divFunction").style.opacity = "0.80";   
        document.getElementById("divFunction").style.color="#6ba7e6";
        document.getElementById("divFunction").style.backgroundColor = "#666666";
        document.getElementById("divFunction").style.textAlign = "center";
        
//         document.getElementById("divFunction1").style.width = document.getElementById("gvFunction").offsetWidth + 30 + 'px';
//         document.getElementById("divFunction1").style.height = document.getElementById("gvFunction").offsetHeight + 30 + 'px';
        document.getElementById("divFunction1").style.width = "398px"
        document.getElementById("divFunction1").style.height = "330px"
        document.getElementById("divFunction1").style.zIndex = "1000";
        document.getElementById("divFunction1").style.position = "absolute";
        document.getElementById("divFunction1").style.left="30.8%";
        document.getElementById("divFunction1").style.top="10%";
        document.getElementById("divFunction1").style.padding = "0px";
        document.getElementById("divFunction1").style.backgroundColor="#ffffff";
        document.getElementById("divFunction1").style.border="0px solid #bdbdbd";
        document.getElementById("divFunction1").style.textAlign = "center";
        //document.getElementById("tbTLT_Card_Id").focus();
            //document.getElementById("tbTLT_Card_Id").select();
        
         //设置前面透明层
            document.getElementById("divFunction0").style.width = "418px"
        document.getElementById("divFunction0").style.height = "346px"
        document.getElementById("divFunction0").style.zIndex = "999"; //定位元素的顺序
        document.getElementById("divFunction0").style.position = "absolute"; //设置元素的定位方式
        document.getElementById("divFunction0").style.top = "9%" 
        document.getElementById("divFunction0").style.left = "30%";
        document.getElementById("divFunction0").style.filter = "alpha(opacity=40)"; //设置背景透明
        document.getElementById("divFunction0").style.opacity = "0.80"; 
        document.getElementById("divFunction0").style.color="#6ba7e6";
        document.getElementById("divFunction0").style.backgroundColor = "#7a7a7a";
        document.getElementById("divFunction0").style.textAlign = "center";
        
         }
         else
         {    
            document.getElementById("divFunction").style.display="none";
            document.getElementById("divFunction1").style.display="none";
            document.getElementById("divFunction0").style.display="none";
         }
    }  是个弹出div层，不知为什么当点击按钮时，div就跑到了最顶层，且后面的遮罩层只显示一半。
  

Answer 1

没html不好分析,这里有个弹出层的,你也可以参考<script type="text/javascript">
    var docEle = function()
    {
        return document.getElementById(arguments[0]) || false;
    }    function openNewDiv(_id)
    {
        var m = "mask";
        if (docEle(_id)) document.body.removeChild(docEle(_id));
        if (docEle(m)) document.body.removeChild(docEle(m));        //mask遮罩层        var newMask = document.createElement("div");
        newMask.id = m;
        newMask.style.position = "absolute";
        newMask.style.zIndex = "1";
        _scrollWidth = Math.max(document.body.scrollWidth,document.documentElement.scrollWidth);
        _scrollHeight = Math.max(document.body.scrollHeight,document.documentElement.scrollHeight);
        newMask.style.width = _scrollWidth + "px";
        newMask.style.height = _scrollHeight + "px";
        newMask.style.top = "0px";
        newMask.style.left = "0px";
        newMask.style.background = "#33393C";
        newMask.style.filter = "alpha(opacity=40)";
        newMask.style.opacity = "0.40";
        document.body.appendChild(newMask);        //新弹出层        var newDiv = document.createElement("div");
        newDiv.id = _id;
        newDiv.style.position = "absolute";
        newDiv.style.zIndex = "9999";
        newDivWidth = 400;
        newDivHeight = 200;
        newDiv.style.width = newDivWidth + "px";
        newDiv.style.height = newDivHeight + "px";
        newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px";
        newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px";
        newDiv.style.background = "#EFEFEF";
        newDiv.style.border = "1px solid #860001";
        newDiv.style.padding = "5px";
        newDiv.innerHTML = " ";
        document.body.appendChild(newDiv);        //弹出层滚动居中        function newDivCenter()
        {
            newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px";
            newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px";
        }
        if(document.all)
        {
            window.attachEvent("onscroll",newDivCenter);
        }
        else
        {
            window.addEventListener('scroll',newDivCenter,false);
        }        //关闭新图层和mask遮罩层
        var newA = document.createElement("div");
        newA.innerHTML ="关闭";
        newA.onclick = function(){
            if(document.all)
            {
                window.detachEvent("onscroll",newDivCenter);
            }
            else
            {
                window.removeEventListener('scroll',newDivCenter,false);
            }
            document.body.removeChild(docEle(_id));
            document.body.removeChild(docEle(m));
            return false;
        }
        newDiv.appendChild(newA);
    }
</script>
<body>    <a onclick="openNewDiv('newDiv');return false;" style="cursor:pointer">弹出层</a>
</body>

Answer 2

我也给你发个简单的吧<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>弹出提示</title>
<style>
* {margin:0;padding:0;font-size:12px;}
html,body {height:100%;width:100%;}
#content {background:#f8f8f8;padding:30px;height:100%;}
#content a {font-size:30px;color:#369;font-weight:700;}
#alert {border:1px solid #369;width:300px;height:150px;background:#e2ecf5;z-index:1000;position:absolute;display:none;}
#alert h4 {height:20px;background:#369;color:#fff;padding:5px 0 0 5px;}
#alert h4 span {float:left;}
#alert h4 span#close {margin-left:210px;font-weight:500;cursor:pointer;}
#alert p {padding:12px 0 0 30px;}
#alert p input {width:120px;margin-left:20px;}
#alert p input.myinp {border:1px solid #ccc;height:16px;}
#alert p input.sub {width:60px;margin-left:30px;}
</style>
</head>
<body>
<div id="content">
<a href="#">注册</a>
</div><a href="#">dd</a>
<div id="alert">
<h4><span>现在注册</span><span id="close">关闭</span></h4>
<p><label>用户名</label><input type="text" class="myinp" onmouseover="this.style.border='1px solid #f60'" onfoucs="this.style.border='1px solid #f60'" onblur="this.style.border='1px solid #ccc'" /></p>
<p><label>密　码</label><input type="password" class="myinp" onmouseover="this.style.border='1px solid #f60'" onfoucs="this.style.border='1px solid #f60'" onblur="this.style.border='1px solid #ccc'" /></p>
<p><input type="submit" value="注册" class="sub" /><input type="reset" value="重置" class="sub" /></p>
</div>
<script type="text/javascript">var myAlert = document.getElementById("alert");
var reg = document.getElementById("content").getElementsByTagName("a")[0];
var mClose = document.getElementById("close");
reg.onclick = function()
{mybg = document.createElement("div");
mybg.setAttribute("id","mybg");
mybg.style.background = "#000000";
mybg.style.width = "100%";
mybg.style.height = "100%";
mybg.style.position = "absolute";
mybg.style.top = "0";
mybg.style.left = "0";
mybg.style.zIndex = "10";
mybg.style.filter = "Alpha(opacity=0)";
document.body.appendChild(mybg);
myAlert.style.display = "block";
myAlert.style.position = "absolute";
myAlert.style.top = "50%";
myAlert.style.left = "50%";
myAlert.style.marginTop = "-75px";
myAlert.style.marginLeft = "-150px";
}
mClose.onclick = function()
{
myAlert.style.display = "none";
mybg.style.display = "none";
}
</script></body>
</html>