jquery sortable的拖动方法示例详解

$(function() {
var show = $(".loader");
var orderlist = $(".orderlist");
var listleft = $("div[id = 'column_left']");
var listcenter = $("div[id = 'column_center']");
var listright = $("div[id = 'column_right']");
$( ".column" ).sortable({
opacity: 0.5,//拖动的透明度
revert: true, //缓冲效果
cursor: 'move', //拖动的时候鼠标样式
connectWith: ".column",
//开始用update 结果执行两次，浪费资源，古改成stop
//但是stop在元素没有改变位置的时候也会执行，
//用update其他js会有问题，^_^
stop: function(){
var new_order_left = []; //左栏布局
var new_order_center = [];//中栏布局
var new_order_right = [];//右栏布局
listleft.children(".portlet").each(function() {
new_order_left.push(this.title);
});
listcenter.children(".portlet").each(function() {
new_order_center.push(this.title);
});
listright.children(".portlet").each(function() {
new_order_right.push(this.title);
});
var newleftid = new_order_left.join(',');
var newcenterid = new_order_center.join(',');
var newrightid = new_order_right.join(',');
$.ajax({
type: "post",
url: jsonUrl, //服务端处理程序
data: { leftid: newleftid, centerid: newcenterid, rightid:newrightid}, //id:新的排列对应的ID,order：原排列顺序
// beforeSend: function() {
// show.html(" 正在更新");
// },
success: function(msg) {
//alert(msg);
show.html("");
}
});
}
});