日期:2014-05-16  浏览次数:20426 次

新手求助:javascript判断display值,只能识别block
目标是:点击一级菜单“one”时,显示二级菜单“one.1,one.2,....”
代码如下:
JScript code

<!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" xml:lang="en" lang="en">

<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
    <meta name="author" content="www.budingwang.com" />

    <title>无标题 1</title>
<style>
*{margin:0px;padding:0px;}
li{list-style: none;}
li > ul{display:none;}
</style>
</head>
<body>
<ul id="tree">
    <li>
        <a id="first" href="#">one</a>
        <ul id="first_child">
            <li>one.1</li>
            <li>one.2</li>
        </ul>
    </li>
</ul>
</body>
<script>
document.getElementById("first").addEventListener("click",nodeAction,false);
function nodeAction(){
    if(document.getElementById("first_child").style.display=="block"){  //这里为none时,前两次点击有效,之后无效,搞不懂???
        document.getElementById("first_child").style.display="none";
    }else{
        document.getElementById("first_child").style.display="block";
    }
}
</script>
</html>







------解决方案--------------------
JScript code
document.getElementById("first").addEventListener("click",nodeAction,false);
function nodeAction(){
    if(document.getElementById("first_child").style.display=="none"){  //这里为none时,前两次点击有效,之后无效,搞不懂???
        document.getElementById("first_child").style.display="block";
    }else{
        document.getElementById("first_child").style.display="none";
    }
}

------解决方案--------------------
li > ul{display:none;}应该为你这里设置了它隐藏
------解决方案--------------------
我用ie9和谷歌测试均没有问题。。。。。。。可能是浏览器兼容问题,建议用jquery写吧
------解决方案--------------------
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JScript code
document.getElementById("first").addEventListener("click",nodeAction,false);
function nodeAction(){
if(document.getElementById("first_child").style.display=="none"){ //这里为none时,前两次……