js 传值问题 缺少对象

Question

<script type="text/javascript" language=javascript>
        function meunshow(did)
        {
            alert(did)
            document.getElementById(did).style.display=(document.getElementById(did).style.display =='' || document.getElementById(did).style.display =='none')?'block':'none'
            
        }
</script>
<a href="#" onclick="meunshow('DIV1')">全部分类</a>
<div id="Div1" style="">
                                <ul>
                                    <li>服饰1</li>
                                    <li>服饰1</li>
                                    <li>服饰1</li>
                                    <li>服饰1</li>
                                    <li>服饰1</li>
                                </ul>
                            </div>JavaScript函数

Answer 1

alert(did) 弹框显示为Div1
求各位解答

Answer 2

<a href="#" onclick="meunshow('DIV1')">全部分类</a>
<div id="Div1" style="">这两个Id 不一样,DIV1 != Div1, 改成一致.

Answer 3

 
我需要getElementById（变量）啊  但是参数变量放进去就会报错 如果直接getElementById（'Div1'） 是肯定没问题的 

Answer 4

<a href="#" onclick="meunshow('Div1')">全部分类</a>
<div id="Div1" style="">
                                <ul>
                                    <li>服饰1</li>
                                    <li>服饰1</li>
                                    <li>服饰1</li>
                                    <li>服饰1</li>
                                    <li>服饰1</li>
                                </ul>
                            </div>
js区分大小写的

Answer 5

两个问题：
1. alert(did) 后面掉了分号
2. 网络不好或者意外情况下面，用户点了后，由于div1过于庞大，还未能解析到dom树中
所以，你那个<script>尽量移到靠后的位置，一般可以放到</body>前面