为什么列表元素的CSS样式的值是空的?
我是想输入 <ul> <ol> 的display,margin属性.可是为什么是空的呢?
代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN " "http://www.w3.org/TR/html4/loose.dtd ">
<html>
<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=GB18030 ">
<title> Insert title here </title>
<style type= "text/css ">
ol { margin-left:0px; list-style-type:lower-alpha; list-style-position:inside; }
ol li{ margin-left:0px; border:1px solid black;list-style-type:upper-alpha; }
a{display:list-item;list-style-type: decimal; margin-left:80px; }
a:link{color:blue;}
a:hover{color:red;}
a:active{color:yellow;}
a:visited{color:green;}
</style>
</head>
<body>
<h2 id= "h2 ">
省份
</h2>
<ol id= "a " >
<li id= "a1 ">
湖北
</li>
<li>
湖南
</li>
<li>
浙江
</li>
</ol>
<h2>
城市
</h2>
<ul id= "b ">
<li id= "b1 ">
武汉
</li>
<li>
长沙
</li>
<li>
杭州
</li>
</ul>
<script type= "text/javascript ">
document.writeln( "h2 display: "+document.getElementById( "h2 ").style.display+ " <br> ");
document.writeln( "h2 margin: "+document.getElementById( "h2 ").style.margin+ " <br> ");
document.writeln( "a display: "+document.getElementById( "a ").style.display+ " <br> ");
document.writeln( "a margin: "+document.getElementById( "a ").style.margin+ " <br> ");
document.writeln( "a listStyleType: "+document.getElementById( "a ").style.listStyleType+ " <br> ");
document.writeln( "a1 display: "+document.getElementById( "a1 ").style.display+ " <br> ");
document.writeln( "a1 margin: "+document.getElementById( "a1 ").style.marginLeft + " <br> ");
// alert(document.getElementById( "a1 ").style.marginLeft);
document.writeln( "b display: "+document.getElementById( "b ").style.display+ " <br> ");
document.writeln( "b margin: "+document.getElementById( "b ").style.margin+ " <br> ");
document.writeln( "b1 display: "+document.getElementById( "b1 ").style.display+ " <br> ");
document.writeln( "b1 margin: "+document.getElementById( "b1 ").style.margin+ " <br> ");
</script>
</body>
</html>
------解决方案--------------------
document.writeln( "h2 display: "+document.getElementById( "h2 ").currentStyle.display+ " <br> ");
document.writeln( "h2 margin: "+document.getElementById( "h2 ").currentStyle.margin+ " <br> ");
document.writeln( "a display: "+document.getElementById( "a ").currentStyle.display+ " <br> ");
document.writeln( "a margin: "+document.getElementById( "a ").currentStyle.margin+ " <br> ");
document.writeln( "a listStyleType: "+document.getElementById( "a ").currentStyle.listStyleType+ " <br> ");
document.writeln( "a1 display: "+document.getElementById( "a1 ").currentStyle.display+ " <br> ");
document.writeln( "a1 margin: "+document.getElementById( "a1 ").currentStyle.marginLeft + " <br> ");
// alert(document.getElementById( "a1 ").style.marginLeft);
document.writeln( "b display: "+document.getElementById( "b ").currentStyle.display+ " <br> ");
document.writeln( "b margin: "+document.getElementById( "b ").currentStyle.margin+ " <br> ");
document.writeln( "b1 display: "+document.getElementById( "b1 ").currentStyle.display+ " <br> ");
document.writeln( "b1 margin: "+document.getElementById( "b1 ").currentStyle.margin+ " <br> ");
