请问层中的z-index在javascript怎么用？

<script language="javascript" type="text/javascript">

function changeit(img)
{
if ( img == 'sohu')
{
var si = document.getElementById('sina');
var so = document.getElementById('sohu')
si.style.zIndex = 3;
so.style.zIndex = 4;
}
else if ( img == 'sina')
{
var si = document.getElementById('sina');
var so = document.getElementById('sohu')
si.style.zIndex = 4;
so.style.zIndex = 3;
}
}
</script>
</HEAD><BODY>
<div id="con" style="position:absolute;z-index:2;">
<br/><br/>
<img id="sina" src="http://www.sina.com/images/NA01.gif" style="position:absolute;z-index:3">
<img id="sohu" src="http://images.sohu.com/uiue/sohu_logo/2005/index_logo.gif" style="position:absolute;z-index:4">
</div>
<select onchange="changeit(this.value);">
<option value='sohu'>SOHU is over</option>
<option value='sina'>SINA is over</option>
</select>
</BODY>
</HTML>

解决方案 »

  1.   

    zIndex,一般在css标签中的使用－分隔的值在js中是将中划线去掉，将后面的单词首字母变成大写即可。
    比如z-index：zIndex
    background-color:backgroundColor
      

  2.   

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 //EN">
    <HTML><HEAD>
    <TITLE>fantiny</TITLE>
    <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312">
    <META NAME="Generator" CONTENT="PhotoImpact">
    <META NAME="Keyword" CONTENT="fantiny,game.">
    <META NAME="Author" CONTENT="fantiny"><style type="text/css">
    <!--
    body{font-size:13px;  /*tppabs="pkq_2.bmp"*/
         COLOR: #ff9650
        }p{ font-size:13px;
       COLOR: #ff9650
     }
    td { font-size: 13px
         COLOR: #ff9650;
       }
    a{ COLOR: #ff9650;
       TEXT-DECORATION:none;
       font-size:16px}
     }
    -->
    </style><SCRIPT language=javascript>Phrase="1234567890ABC";
    Balises=""
    Taille=20;
    Midx=100;
    Decal=0.5;
    Nb=Phrase.length;
    y=-10000;
    for (x=0;x<Nb;x++){
      Balises=Balises + '<DIV Id=L' + x + ' STYLE="width:3;font-family: Courier New;font-weight:bold;position:absolute;top:40;left:50;z-index:0">' + Phrase.charAt(x) + '</DIV>'
    }
    document.write (Balises);
    Time=window.setInterval("Alors()",10);
    Alpha=5;
    I_Alpha=0.05;function Alors(){
        Alpha=Alpha-I_Alpha;
        for (x=0;x<Nb;x++){
            Alpha1=Alpha+Decal*x;
            Cosine=Math.cos(Alpha1);
            Ob=document.all("L"+x);
            Ob.style.posLeft=Midx+100*Math.sin(Alpha1)+50;
            Ob.style.zIndex=20*Cosine;
            Ob.style.fontSize=Taille+15*Cosine;
            Ob.style.color="rgb("+ (27+Cosine*80+50) + ","+ (127+Cosine*80+50) + ",0)";
        }
    }</SCRIPT></HEAD><BODY LEFTMARGIN="0" MARGINWIDTH="0" TOPMARGIN="0" MARGINHEIGHT="0" bgcolor="#ffffcc" OnLoad="getwindowsize()" OnResize="getwindowsize()">
    </BODY></HTML>