一个棘手的问题,100分 http://expert.csdn.net/Expert/topic/1632/1632451.xml?temp=.7715876 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 http://expert.csdn.net/Expert/topic/1605/1605298.xml?temp=.1401941 看看吧:<html><BODY><SELECT NAME="s1"><option>需要JavaScript才能正确显示</SELECT><SELECT NAME="s2"></SELECT><SELECT NAME="s3"></SELECT><SELECT NAME="s4"></SELECT><SCRIPT LANGUAGE="JavaScript"><!--//选择框的名字selector = [ "s1", "s2", "s3", "s4" ];//选择项: "名字", "值", 子选择menu = ["地球","1", [ "中国","86", [ "北京","BJ", [ "--","1",null ], "四川","SC", [ "成都","28",null, "乐山","",null, "攀枝花","",null, "自贡","",null, "德阳","",null, "绵阳","",null ] ], "米国","1", [ "加利福尼亚","CA", [ "旧金山","1",null, "洛杉矶","2",null ], "华盛顿","WA", [ "西雅图","seattle",null ] ] ],"火星","2", [ "大峡谷","86", [ "小山丘","BJ", [ "A地区","28",null, "B地区","",null, "C地区","",null ] ] ]]; function wizz(level){ if( level == 0 ) a = menu; else { str = "menu"; for( i=0; i<level; i++ ) str += "[" + (document.all[selector[i]].selectedIndex * 3 + 2) + "]"; a = eval(str); } if( a == null ) return; s = document.all[selector[level]]; i = s.length; while( i > 0 ) s.options[--i] = null; while( i < Math.floor(a.length/3) ) s.options[i] = Option( a[i*3], a[i++*3+1] ); s.onchange = Function("wizz(" + (level+1) + ")"); wizz(level+1);}wizz(0);//--></SCRIPT></BODY></HTML> 谁用过swfupload?进来下 以下代码有3个表格,怎样能开始时全部禁止,按前面类型就允许。急 如何获取表格自定义的属性值? 关于JS在火狐中不能运行的问题 双击一行如何得到这一行的第一列和第三列的值? 在 asp 如何接收 列表框 的 所有 的选项 ?????? 寻找一个特效,谢谢! 请教JS高手:怎样才能禁止IE里面F6键的操作 高手帮忙关于光标焦点的问题 keyDown事件如何记录键盘依次输入的字符呢~~~~ 如何根据一个id,判断具有该id的控件究竟是否存在? 两个列表框的移动,错在哪里,请各位帮着看看?
<html>
<BODY>
<SELECT NAME="s1"><option>需要JavaScript才能正确显示</SELECT>
<SELECT NAME="s2"></SELECT>
<SELECT NAME="s3"></SELECT>
<SELECT NAME="s4"></SELECT>
<SCRIPT LANGUAGE="JavaScript">
<!--
//选择框的名字
selector = [ "s1", "s2", "s3", "s4" ];
//选择项: "名字", "值", 子选择
menu = [
"地球","1",
[
"中国","86",
[
"北京","BJ",
[
"--","1",null
],
"四川","SC",
[
"成都","28",null,
"乐山","",null,
"攀枝花","",null,
"自贡","",null,
"德阳","",null,
"绵阳","",null
]
],
"米国","1",
[
"加利福尼亚","CA",
[
"旧金山","1",null,
"洛杉矶","2",null
],
"华盛顿","WA",
[
"西雅图","seattle",null
]
]
],
"火星","2",
[
"大峡谷","86",
[
"小山丘","BJ",
[
"A地区","28",null,
"B地区","",null,
"C地区","",null
]
]
]
];
function wizz(level)
{
if( level == 0 )
a = menu;
else
{
str = "menu";
for( i=0; i<level; i++ )
str += "[" + (document.all[selector[i]].selectedIndex * 3 + 2) + "]";
a = eval(str);
}
if( a == null ) return;
s = document.all[selector[level]];
i = s.length;
while( i > 0 ) s.options[--i] = null;
while( i < Math.floor(a.length/3) )
s.options[i] = Option( a[i*3], a[i++*3+1] );
s.onchange = Function("wizz(" + (level+1) + ")");
wizz(level+1);
}
wizz(0);
//-->
</SCRIPT>
</BODY>
</HTML>