简单实现jQuery级联菜单

.button { border: 1px ridge #ffffff; line-height:18px; height: 20px; width: 45px; padding-top: 0px; background:#CBDAF7; color:#000000; font-size: 9pt;} 

<div style="border:1px dashed #E6E6E6;margin:150px 0px 0px 450px; width:280px; height:200px; background-color:#E6E6E6;"><table width="285" height="169" border="0" align="left" cellpadding="0" cellspacing="0" style="margin:15px 0px 0px 15px;"><tr><td width="126"><select name="first" size="10" multiple="multiple" class="td3" id="first"><option value="选项1">选项1</option><option value="选项2">选项2</option><option value="选项3">选项3</option><option value="选项4">选项4</option><option value="选项5">选项5</option></select> </td><td width="69" valign="middle"><input name="add" id="add" type="button" class="button" value="-->" /> <input name="add_all" id="add_all" type="button" class="button" value="==>" /><input name="remove" id="remove" type="button" class="button" value="<--" /><input name="remove_all" id="remove_all" type="button" class="button" value="<==" /></td><td width="127" align="left"><select name="second" size="10" multiple="multiple" id="second"><option value="选项6">选项6</option></select></td></tr></table>

$(document).ready(function(){$("#add").click(function(){ $("#first option:selected").appendTo($("#second"));});$("#add_all").click(function(){ $("#first option").appendTo($("#second"));});$("#remove").click(function(){ $("#second option:selected").appendTo($("#first"));});$("#remove_all").click(function(){ $("#second option").appendTo($("#first"));});});