select标签HTML，刚做地。
<HTML>
<HEAD>
<TITLE>页面选择</TITLE>
<script language='javascript'>
function selectC()
{
//var obj=document.getElementById("b");
for(var k=0;k<document.form1.select.length+1;k++)
{
document.form1.select.options.remove( document.form1.select[k]); //删除所有b下拉列表框中的内容
}
if (document.all("bm").value=="生产部")
{
document.form1.select.remove(0);
document.form1.select.options[document.form1.select.options.length] = new Option('工程', 0);
document.form1.select.options[document.form1.select.options.length] = new Option('品管', 1);
}
if (document.all("bm").value=="业务部")
{
document.form1.select.remove(0);
document.form1.select.options[document.form1.select.options.length] = new Option('总经理', 0);
document.form1.select.options[document.form1.select.options.length] = new Option('部门经理', 1);
document.form1.select.options[document.form1.select.options.length] = new Option('业务助理', 2);
document.form1.select.options[document.form1.select.options.length] = new Option('业务员', 3);
}
}
</script>
</HEAD>
<BODY>
<form name="form1" method="post" action="">
<select id='bm' name='bm' onchange='selectC()'>
<option value="请选择">请选择</option>
<option value="业务部">业务部</option>
<option value="生产部">生产部</option>
</select>
<select id='select' name='select' >
<option value="请选择">请选择</option>
</select>
</form>
</BODY>
</HTML>
