关键字：jQuery监听事件经典例子
[color=red]js代码：[/color]
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$(function(){
$("#s1 option:first,#s2 option:first").attr("selected",true);
$("#s1").dblclick(function(){
var alloptions = $("#s1 option");
var so = $("#s1 option:selected");
so.get(so.length-1).index == alloptions.length-1?so.prev().attr("selected",true):so.next().attr("selected",true);
$("#s2").append(so);
});
$("#s2").dblclick(function(){
var alloptions = $("#s2 option");
var so = $("#s2 option:selected");
so.get(so.length-1).index == alloptions.length-1?so.prev().attr("selected",true):so.next().attr("selected",true);
$("#s1").append(so);
});
$("#add").click(function(){
var alloptions = $("#s1 option");
var so = $("#s1 option:selected");
so.get(so.length-1).index == alloptions.length-1?so.prev().attr("selected",true):so.next().attr("selected",true);
$("#s2").append(so);
});
$("#remove").click(function(){
var alloptions = $("#s2 option");
var so = $("#s2 option:selected");
so.get(so.length-1).index == alloptions.length-1?so.prev().attr("selected",true):so.next().attr("selected",true);
$("#s1").append(so);
});
$("#addall").click(function(){
$("#s2").append($("#s1 option").attr("selected",true));
});
$("#removeall").click(function(){
$("#s1").append($("#s2 option").attr("selected",true));
});
$("#s1up").click(function(){
var so = $("#s1 option:selected");
if(so.get(0).index!=0){
so.each(function(){
$(this).prev().before($(this));
});
}
});
$("#s1down").click(function(){
var alloptions = $("#s1 option");
var so = $("#s1 option:selected");
if(so.get(so.length-1).index!=alloptions.length-1){
for(i=so.length-1;i>=0;i--)
{
var item = $(so.get(i));
item.insertAfter(item.next());
}
}
});
$("#s2up").click(function(){
var so = $("#s2 option:selected");
if(so.get(0).index!=0){
so.each(function(){
$(this).prev().before($(this));
});
}
});
$("#s2down").click(function(){
var alloptions = $("#s2 option");
var so = $("#s2 option:selected");
if(so.get(so.length-1).index!=alloptions.length-1){
for(i=so.length-1;i>=0;i--)
{
var item = $(so.get(i));
item.insertAfter(item.next());
}
}
});
});
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