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下拉菜单如何关联阿。()

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Release: 2016-06-13 13:50:45
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下拉菜单怎么关联阿。(高手指点)
页面两个下拉菜单。要怎么关联起来阿
例如:这是奥运会的项目。
两个下拉菜单。一个菜单男女,一个菜单是男女的项目名称



------解决方案--------------------

HTML code


<script type="text/javascript">
function select()
{
var ename=document.f1.ename.value;
var names=new Array(3);
names['男']=['拳击','棒球'];
names['女']=['女子摔跤','平衡术'];
document.f1.film.length=0;//清空下拉列表的值
for( var i=0;i<names[ename].length;i++)
{
var newoption=new Option(names[ename][i],names[ename][i]);//创建新的选项
var film=document.f1.film;//得到下拉列表对象
film.options.add(newoption);//添加
}
}
</script>
  
  
  
  
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