是这个意思吗?<select id='sel'>
<option value='1'>1</option>
<option value='2'>2</option>
<option value='3'>3</option>
<option value='4'>4</option>
<option value='5'>5</option>
</select>
<input type='text' onchange='document.getElementById("sel").selectedIndex=this.value'>
<option value='1'>1</option>
<option value='2'>2</option>
<option value='3'>3</option>
<option value='4'>4</option>
<option value='5'>5</option>
</select>
<input type='text' onchange='document.getElementById("sel").selectedIndex=this.value'>
<input type="text" value="11" name="t1" />
<input type="text" value="23" name="t2" />
<input type="text" value="18" name="t3" />
<br />
<select id="ft1">
<option value="1">1</option>
<option value="7">7</option>
<option value="11">11</option>
<option value="18">18</option>
<option value="24">24</option>
<option value="23">23</option>
</select>
<select id="ft2">
<option value="1">1</option>
<option value="7">7</option>
<option value="11">11</option>
<option value="18">18</option>
<option value="24">24</option>
<option value="23">23</option>
</select>
<select id="ft3">
<option value="1">1</option>
<option value="7">7</option>
<option value="11">11</option>
<option value="18">18</option>
<option value="24">24</option>
<option value="23">23</option>
</select>
<input type="button" onclick="t1" value="cl"/>
<script>
function t1(){
var t1 = document.getElementsByName("t1").value;
var tf1 = document.getElementById("ft1");
var to1 = tf1.getElementsByTagName("option");
for(i=0;i<to1.length;i++)
{
if(t1==to1[i].value)
{
to1[i].selected="selected";
break;
}
}
}
</script>
</CODE>
<script>
function t1(){
var t1 = document.getElementsByName("t1")[0].value;
var tf1 = document.getElementById("ft1");
var to1 = tf1.getElementsByTagName("option");
for(i=0;i <to1.length;i++)
{
if(t1==to1[i].value)
{
to1[i].selected="selected";
break;
}
}
}
</script>
var t1 = document.getElementsByName("t1")[0].value
这个问题 谢谢