ms说select是个窗口元素，而不是块元素、行内元素，这是不是就是它与众不同的原因？
楼主的机器是不是经常死机哦
<select id=left size=5 style=\"width:50;float:left\">
<option value=1 selected>1</option>
<option value=2>2</option>
<option value=3>3</option>
<option value=4>4</option>
<option value=5>5</option>
</select><div style=\"position:static;float:left;line-height:15px\">
<button onclick=\"allMoveRight()\">>></button><br>
<button onclick=\"allMoveLeft()\"><<</button><br>
<button onclick=\"moveRight()\">>|</button><br>
<button onclick=\"moveLeft()\"><|</button>
</div><select id=right size=5 style=\"width:50;float:left\">
</select><script>
function allMoveRight() {
right.length=left.length;
for (var i=0;i<left.length;i++) {
var txt=left.options[i].text;
var val=left.options[i].value;
var menu=new Option(txt,val);
right.options[i]=menu;
}
return
}function moveRight() {
right.length+=1;
var txt=left.options[left.selectedIndex].text;
var val=left.options[left.selectedIndex].value;
var menu=new Option(txt,val);
right.options[right.length-1]=menu;
return
}function moveLeft() {
right.options.remove(right.selectedIndex);
}function allMoveLeft() {
right.length=0;
}
</script>