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<html>
<body>
<select id="s1" multiple="multiple">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
<select id="s2" multiple="multiple">
</select>
<input id="Button1" type="button" value="button" onclick="ww()" />
</body>
</html>
<script>
function ww(){
var li1 = document.getElementById("s1");
var li2 = document.getElementById("s2");
for (var i = 0; i < li1.options.length; i++) {
if (li1.options[i].selected == true) {
var option = document.createElement("option");
option.value = li1.options[i].value;
option.text = li1.options[i].text;
li2.options.add(option);
li1.options.remove(i);//remove传i就行
i--;//length变了 需要调整i
}
}
}
</script>
<select id="s1" multiple="multiple">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<div id=a></div>
<input id="Button1" type="button" value="button" onclick="ww()" />
</body>
</html>
<script>
function $(id){return document.getElementById(id)}
function ww(){
var li1 = $("s1"), li2 = $("s2"),opt=null;
var x=li1.cloneNode(true); x.id="s2";
$("a").appendChild(x) ;
li1.length=0;
}
</script>
<script>
function $(id){return document.getElementById(id)}
function ww(){
var li1 = $("s1"), li2 = $("s2"),opt=null;
for (var i = 0; i < li1.length; i++){
var x=$("s1").options[i].cloneNode(true); li2.appendChild(x);
}
li1.length=0;
}
</script>
<select id="s1" multiple="multiple">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select id="s2" multiple="multiple">
</select>
<input id="Button1" type="button" value="button" onclick="ww()" />
</body>
</html>
<script>
function $(id){return document.getElementById(id)}
function ww(){
var li1 = $("s1"), li2 = $("s2"),selectedIdex=0,opt=null;
for (var i = 0; i < li1.length; i++){
opt = document.createElement("option");
opt.value=li1.options[i].value;
opt.text=li1.options[i].text;
if (li1.options[i].selected){ opt.selected=true; }
li2.appendChild(opt);
}
li1.length=0;
}
</script>