高分求救, 低难度(我是菜鸟), 高分数(你是高手)

shingle 2002-10-31 01:00:56

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shingle 2002-11-03

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不好意思
本来当天解决问题当天给分, 只可惜 CSDN 服务器太忙, 老提交不上,

很报歉, 分我照样给, 不成谢意!!!

这是 JAVA 生成的树, 在 javaScript 中还真的好用

<script language="javaScript">
//树节点的数据结构
function node( name, value, child )
{
this.name = name;
this.value = value;
this.child = child;
}

//将一个下拉列表的所有项目删除
function removeAllItem( aSelect )
{
if( aSelect.options != null )
{
var count = aSelect.options.length
for( var i = 0; i < count ; i++ )
{
aSelect.remove( 0 );
}
}
}

//在树内部递归搜索
function searchInTree( tree, val )
{
if( tree != null && tree.child != null )
{
if( tree.value == val )return tree;

for( var i = 0; i < tree.child.length; i++ )
{
if( tree.child != null )
{
var aNode = searchInTree( tree.child[i], val );
if( aNode != null )return aNode;
}
}
}
return null;
}

//将一个节点的所了项目加到下拉列表的项目中去
function goOverANode( aNode, aSelect )
{
if( aNode != null && aNode.child != null )
{
for( var i = 0; i < aNode.child.length; i++ )
{
aSelect.add( new Option( aNode.child[i].name, aNode.child[i].value ) );
}
}
}

//查找节点, 更新下拉列表
function searchAndMade( tree, aSelect, val )
{
removeAllItem( aSelect );

aSelect.add( new Option( "请选择", "" ) );
var nd = searchInTree( tree, val );

goOverANode( nd, aSelect );
}

//生成数据树
aTree = new node ( "属于板块名称", "0",
new Array(
new node ( "团购首页", "6",
new Array(
new node ( "团购博士", "9", null ) ,
new node ( "楼盘追踪", "17", null ) ,
new node ( "购房常识", "22", null ) ,
new node ( "人物专访", "28", null ) ,
new node ( "金融咨询", "35", null ) ,
new node ( "公告板", "43", null ) ,
new node ( "行业动态", "912", null )
)
) ,
new node ( "房屋团购", "52",
new Array(
new node ( "行业动态", "62", null ) ,
new node ( "政策法规", "72", null ) ,
new node ( "购房常识", "82", null )
)
) ,
new node ( "汽车团购", "92",
new Array(
new node ( "行业动态", "102", null ) ,
new node ( "政策法规", "112", null ) ,
new node ( "新车看台", "132", null ) ,
new node ( "购车常识", "142", null )
)
) ,
new node ( "建材团购", "152",
new Array(
new node ( "行业动态", "162", null ) ,
new node ( "政策法规", "172", null ) ,
new node ( "质量看台", "182", null ) ,
new node ( "诚信档案", "192", null )
)
) ,
new node ( "家装团购", "212",
new Array(
new node ( "温馨家园", "732", null ) ,
new node ( "诚信档案", "842", null ) ,
new node ( "行业动态", "672", null ) ,
new node ( "流行趋势", "852", null ) ,
new node ( "家装常识", "882", null )
)
)
)
) ;

</script>

huangyq 2002-10-31

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学ing

孟子E章 2002-10-31

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http://lucky.myrice.com/javascriptexam/add_del_Select.htm

bencalie 2002-10-31

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shingle 2002-10-31

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多谢 !

net_lover(孟子E章)

代码我己完成如下, 还请指点一二

<script language="javaScript" >
aArray = new Array(
new Array(
"aa",
"ab",
"ac",
new Array(
"ada",
"adb"
),
"ae"
),
"b",
"c",
"d"
);

function showA( A )
{
for( var i = 0; i < A.length; i ++ )
{
if( typeof( A[i] ) == "object" )
{
showA( A[i] );
}else{
alert( A[i] );
}
}
}
</script>

不过还有一事不能解决, 我怎样才能在一个 Select 中动态地增删选项呢?
我想清空一个 select 选项然后重新加入新的选项, 请问如何能实现? 谢谢

bencalie 2002-10-31

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上面我贴错了，抱歉

<script language="javaScript" >
aArray = new Array(new Array("aa","ab","ac",new Array("ada","adb"),"ae"),"b","c","d");
function showA( A )
{
var aa=aArray.toString().split(",")
for(i=0;i<aa.length;i++)
alert(aa[i]) //如何在这里显示 aArray 的每一个无素( 遍历到每一个元素)
}
showA()
</script>

bencalie 2002-10-31

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<table id=a1>
<tr><td id=a1b1>一个表格的单元格</td></tr>
<tr><td id=a1b2>一个表格的单元格</td></tr>
<tr><td id=a1b3>一个表格的单元格</td></tr>
</table>
<script>
for(i=1;i<=document.all.a1.all.tags("TD").length;i++)
eval("document.all.a1b"+i).runtimeStyle.background='black'
</script>

=======================
区分 Array 与 String:
使用typeof(对象)方法
<script>
var a=new Array()
var b=new String()
alert(typeof(a))
alert(typeof(b))
</script>

shingle 2002-10-31