<table border=0 cellpadding=0 cellspacing=0><form name=meizz>
<tr><td>
<select id=list1 size=8 ondblclick="moveOption(this, this.form.list2)">
<option value=A>aaaaaaaaaa
<option value=B>bbbbbbbbbb
<option value=C>cccccccccc
<option value=D>dddddddddd
<option value=E>eeeeeeeeee
<option value=F>ffffffffff
<option value=G>gggggggggg
<option value=H>hhhhhhhhhh
</select></td>
<td width=40 align=center>
<input name=add type=button value=">>>" onclick="moveOption(this.form.list1, this.form.list2)"><br><br>
<input name=sub type=button value="<<<" onclick="moveOption(this.form.list2, this.form.list1)">
</td><td>
<select id=list2 size=8 ondblclick="moveOption(this, this.form.list1)">
</select>
</td></tr></form>
</table><script language="JavaScript"><!--
function moveOption(e1, e2){
try{
var e = e1.options[e1.selectedIndex];
e2.options.add(new Option(e.text, e.value));
e1.options.remove(e1.selectedIndex);
} catch(e){}
}
//--></script>
论坛上其他人写的。
<tr><td>
<select id=list1 size=8 ondblclick="moveOption(this, this.form.list2)">
<option value=A>aaaaaaaaaa
<option value=B>bbbbbbbbbb
<option value=C>cccccccccc
<option value=D>dddddddddd
<option value=E>eeeeeeeeee
<option value=F>ffffffffff
<option value=G>gggggggggg
<option value=H>hhhhhhhhhh
</select></td>
<td width=40 align=center>
<input name=add type=button value=">>>" onclick="moveOption(this.form.list1, this.form.list2)"><br><br>
<input name=sub type=button value="<<<" onclick="moveOption(this.form.list2, this.form.list1)">
</td><td>
<select id=list2 size=8 ondblclick="moveOption(this, this.form.list1)">
</select>
</td></tr></form>
</table><script language="JavaScript"><!--
function moveOption(e1, e2){
try{
var e = e1.options[e1.selectedIndex];
e2.options.add(new Option(e.text, e.value));
e1.options.remove(e1.selectedIndex);
} catch(e){}
}
//--></script>
论坛上其他人写的。
function moveOver(a,b) {
var LeftID = a;
var RightID = b;
var delIndex;
var max = LeftID.options.length;
for (var i=0;i<max;i++) {
if (LeftID.options[i].selected) {
for (var j=0;j<RightID.options.length;j++) {
if (RightID.options[j].text == LeftID.options[i].text) {
alert("您不能重复加入");
return;
}
}
RightID.options.add(new Option(LeftID.options[i].text,LeftID.options[i].value));
delIndex=i;
}
}
LeftID.options.remove(delIndex);
}
</script>
<select name="sel_1" size="5" id="sel_1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
<input type="button" value=">>" onClick="moveOver(document.getElementById('sel_1'),document.getElementById('sel_2'))">
<input type="button" value="<<" onClick="moveOver(document.getElementById('sel_2'),document.getElementById('sel_1'))">
<select name="sel_2" size="5" id="sel_2">
</select>
var delIndex; ==>var delIndex="";LeftID.options.remove(delIndex); ==> if (delIndex!="") LeftID.options.remove(delIndex);