<select name="sss" size="10" multiple id="gvMaster" onChange="slted()">
<option value="1">a</option>
<option value="2">b</option>
<option value="3">c</option>
</select><select name="sss" size="10" multiple id="s2">
</select>
<button onclick="document.getElementById('s2').innerHTML = document.getElementById('gvMaster').innerHTML">复制</button>
<option value="1">a</option>
<option value="2">b</option>
<option value="3">c</option>
</select><select name="sss" size="10" multiple id="s2">
</select>
<button onclick="document.getElementById('s2').innerHTML = document.getElementById('gvMaster').innerHTML">复制</button>
<!--
function add()
{
var o = document.all.sss;
for(var i=0;i<sss.length;i++)
{
s1.options.add( new Option(sss.options[i].text,sss.options[i].value));
}
}
//-->
</script><select name="sss" size="10" multiple>
<option value="1">a</option>
<option value="2">b</option>
<option value="3">c</option>
</select>
<select name=s1></select>
<p><input type=button value=add onclick="add();"></p>