<select id="se" multiple onchange=seg()>
<option value=1>a1
<option value=2>a2
<option value=3>a3
</select>
<script>
function seg()
{
for (i=0;i<se.length;i++)
{
if (se.options[i].selected)
{
alert(se.options[i].text);
alert(se.options[i].value);
alert(se.options[i].index);
}
}
}</script>
<option value=1>a1
<option value=2>a2
<option value=3>a3
</select>
<script>
function seg()
{
for (i=0;i<se.length;i++)
{
if (se.options[i].selected)
{
alert(se.options[i].text);
alert(se.options[i].value);
alert(se.options[i].index);
}
}
}</script>
<option value="china" id=test1>中国人
<option value="Us" id=test2>美国人
</SELECT>
<script language=javascript>
function test()
{
var selobj = codelist.options[codelist.selectedIndex];
alert("索引为:"+selobj.index);
alert("值为:"+selobj.value);
alert("文本为:"+selobj.text);
alert("ID为:"+selobj.id);
}
</script>
<option value=1>a1
<option value=2>a2
<option value=3>a3
<option value=1>a1
<option value=2>a2
<option value=3>a3
</select>
<script>
function seg()
{
j =0;
for (i=0;i<se.length;i++)
{
if (se.options[i].selected)
{
j++;
if (j>1)
{
for(j=i;j<se.length;j++)
se.options[j].selected = false;
}
}
}
}
</script>