<select id="s" multiple onchange="alert(selected())">
<option id="a" selected>a</option>
<option id="b">b</option>
</select><script type="text/javascript">
function selected()
{
var v,r;
v=document.getElementById("s");
v=v.options;
for(var i=0; i<v.length; i++)
if(v[i].selected)
r += v[i].value +",";
// or r+=v[i].id
// or r+=v[i].innerText return r;
}alert (selected());
</script>
<option id="a" selected>a</option>
<option id="b">b</option>
</select><script type="text/javascript">
function selected()
{
var v,r;
v=document.getElementById("s");
v=v.options;
for(var i=0; i<v.length; i++)
if(v[i].selected)
r += v[i].value +",";
// or r+=v[i].id
// or r+=v[i].innerText return r;
}alert (selected());
</script>
<select name='selectableIDList' multiple style="WIDTH: 100px" >
<option value="111">A</option>
<option value="222">B</option>'
<option value="333">C</option>
<option value="444">D</option>
<option value="555">E</option>
</select>
<input type="submit" name="setDU">
</FORM>
用JAVASCRIPT取出'selectableIDList'中的Value值
{
var v,r;
v=document.getElementById("s");
v=v.options;
for(var i=0; i<v.length; i++)
if(v[i].selected)
{
r += v[i].value;
if(i!=v.length-1)
r +=",";
//以,分隔不同的值
}
return r;
}
function selected2()
{
var v,r;
v=document.getElementById("selectableIDList");
v=v.options;
for(var i=0; i<v.length; i++)
{
r += v[i].value;
if(i!=v.length-1)
r +=",";
//以,分隔不同的值
}
return r;
}
//取出被选中的值,以,分隔
function selected()
{
var v,r;
v=document.getElementById("selectableIDList");
v=v.options;
r=new Array();
j=0;
for(var i=0; i<v.length; i++)
if(v[i].selected)
r[j++]=v[i].value;
r.join(",");
return r;
}