如何实现这个效果

来源：百度知道 编辑：UC知道 时间：2024/06/11 15:47:27
<form name="Search" action="nk.asp" method="post">

<select name="dz1" id="dz1" size="1" style="width:100; height:19">
<option value="A" selected>A</option>
<option value="B">B</option>
<option value="C">C</option>
<option value="D">D</option>
<option value="E">E</option>
<option value="F">F</option>
</select>

<select name="dz2" id="dz2" size="1" style="width:100; height:19">
<option value="A" selected>A</option>
<option value="B">B</option>
<option value="C">C</option>
<option value="D">D</option>
<option value="E">E</option>
<o

加个函数，搞个事件不就行了？

<HTML>
<HEAD>
<script>
function selectdz4()
{
var d3=document.all.dz3;
var seltext=d3.options[d3.selectedIndex].text;
var d4=document.all.dz4;

for(var i=0;i<d4.options.length;i++)
{

if (seltext==d4.options[i].text)
{
d4.options[i].selected=true;
}
}
}

function selectdz2()
{
var d1=document.all.dz1;
var seltext=d1.options[d1.selectedIndex].text;
var d2=document.all.dz2;

for(var i=0;i<d2.options.length;i++)
{

if (seltext==d2.options[i].text)
{
d2.options[i].selected=true;
}
}
}
</script>
</HEAD>

<BODY>
<form name="Search" action="nk.asp" method="post">

<select name="dz1" id="dz1" size="1" style="width:100; height:19&