<script language="JavaScript">
<!--
function aa(num){
my_list1 = new Array("1", "11", "111");
my_list2 = new Array("2", "22", "222");
_list = eval("my_list"+num);
d = form1.select1;
d.length = 0;
for (i = 0; i < _list.length; i++) {
lab = document.createElement("option");
lab.text = _list[i];
lab.value = _list[i];
d.add(lab);
//lab.innerText = _list[i];
//d.appendChild(lab);
}
}
//-->
</script>
</head><body>
<form name="form1" method="post" action="">
请输入数字1或者2 进行测试
<input type="text" onKeyUp="aa(this.value);this.value='';">
<select name="select1" size="3" id="select1">
</select>
</form>
<!--
function aa(num){
my_list1 = new Array("1", "11", "111");
my_list2 = new Array("2", "22", "222");
_list = eval("my_list"+num);
d = form1.select1;
d.length = 0;
for (i = 0; i < _list.length; i++) {
lab = document.createElement("option");
lab.text = _list[i];
lab.value = _list[i];
d.add(lab);
//lab.innerText = _list[i];
//d.appendChild(lab);
}
}
//-->
</script>
</head><body>
<form name="form1" method="post" action="">
请输入数字1或者2 进行测试
<input type="text" onKeyUp="aa(this.value);this.value='';">
<select name="select1" size="3" id="select1">
</select>
</form>
http://joe.2418.com/programme/html/inputAndDrop.rar
function Filteropts()
{
var opart,astr,alen,opln,i,boo;
boo = false;
var result = new Array();
var opts = document.all.sel1.options;
opln = opts.length;
astr = document.all.txt1.value.toLowerCase();
alen = astr.length;
if(alen == 0)
{
for(i=0;i<opln;i++)
{
result[result.length] = opts[i];boo = true;
}
}
else
{
for(i=0;i<opln;i++)
{
opart = opts[i].text.toLowerCase().substring(0,alen)
if(astr == opart)
{
result[result.length]=opts[i];boo=true;
}
}
}
if(!boo){result[0] = ""}
return result;
}
function bao()
{
var opts = document.all.sel1.options;
arr = Filteropts();
opts.length=0;
for(var i=0;i<arr.length;i++)
{
opts[opts.length] = new Option(arr[i].text,arr[i].value);
}
}
</script>
<input type="text" name="txt1" onkeyup="bao()">
<select name="sel1">
<option>123456
<option>234565
<option>345676
<option>356883
<option>456698
</select>
</body>
</html>
function Filteropts()
{
var opart,astr,alen,opln,i,boo;
boo = false;
var result = new Array();
var opts = document.all.sel1clone.options;
opln = opts.length;
astr = document.all.txt1.value.toLowerCase();
alen = astr.length;
if(alen == 0)
{
for(i=0;i<opln;i++)
{
result[result.length] = opts[i];boo = true;
}
}
else
{
for(i=0;i<opln;i++)
{
opart = opts[i].text.toLowerCase().substring(0,alen)
if(astr == opart)
{
result[result.length]=opts[i];boo=true;
}
}
}
if(!boo){result[0] = ""}
return result;
}
function bao()
{
var opts = document.all.sel1.options;
arr = Filteropts();
opts.length=0;
for(var i=0;i<arr.length;i++)
{
opts[opts.length] = new Option(arr[i].text,arr[i].value);
}
}
</script>
<!--过滤显示-->
<input type="text" name="txt1" onkeyup="bao()">
<select name="sel1">
<option>123456
<option>234565
<option>345676
<option>356883
<option>456698
</select>
<!--源数据-->
<select name="sel1clone" style="display:none">
<option>123456
<option>234565
<option>345676
<option>356883
<option>456698
</select>
</body>
</html>