表格操作类(添加，删除，排序，上移，下移)

http://www.cnblogs.com/zyh-nhy/archive/2007/08/14/855063.html

< html >
< head >
< meta http-equiv ="Content-Type" content ="text/html;charset=gb2312" >
< style type ="text/css" > * { } { font-size : 14px } button { } { margin : 3px } </ style >
< script type ="text/javascript" >

var mytable = null ,mytable2 = null ;

window.onload = function () {
mytable = new CTable( " tbl " , 10 );
mytable2 = new CTable( " tbl2 " , 6 );
}

Array.prototype.each = function (f) { for ( var i = 0 ;i < this .length;i ++ )f( this [i],i, this )}

function $A(arrayLike) {
for ( var i = 0 ,ret = [];i < arrayLike.length;i ++ )ret.push(arrayLike[i]);
return ret
}

Function.prototype.bind = function () {
var __method = this ,args = $A(arguments),object = args.shift();
return function () {
return __method.apply(object,args.concat($A(arguments)));
}
}


function CTable(id,rows) {
this .tbl = typeof (id) == " string " ? document.getElementById(id):id;
if (rows && /^ \d + $ / .test(rows)) this .addrows(rows)
}

CTable.prototype = {
addrows: function (n) { // 随机添加n个tr
new Array(n).each( this .add.bind( this ))
} ,
add: function () { // 添加1个tr
var self = this ;
var tr = self.tbl.insertRow( - 1 ),td1 = tr.insertCell( - 1 ),td2 = tr.insertCell( - 1 ),td3 = tr.insertCell( - 1 );
var chkbox = document.createElement( " INPUT " )
chkbox.type = " checkbox "
chkbox.onclick = self.highlight.bind(self)
td1.appendChild(chkbox)
td1.setAttribute( " width " , " 35 " )
td2.innerHTML = Math.ceil(Math.random() * 99 )
td3.innerHTML = Math.ceil(Math.random() * 99 )
} ,
del: function () { // 删除所选tr
var self = this
$A(self.tbl.rows).each( function (tr) { if (self.getChkBox(tr).checked)tr.parentNode.removeChild(tr)} )
} ,
up: function () { // 上移所选tr
var self = this
var upOne = function (tr) { // 上移1个tr
if (tr.rowIndex > 0 ) {
self.swapTr(tr,self.tbl.rows[tr.rowIndex - 1 ])
self.getChkBox(tr).checked = true
}
}
var arr = $A(self.tbl.rows).reverse()
if (arr.length > 0 && self.getChkBox(arr[arr.length - 1 ]).checked) {
for ( var i = arr.length - 1 ;i >= 0 ;i -- ) {
if (self.getChkBox(arr[i]).checked) {
arr.pop()
} else {
break
}
}
}
arr.reverse().each( function (tr) { if (self.getChkBox(tr).checked)upOne(tr)} );
} ,
down: function () {
var self = this
var downOne = function (tr) {
if (tr.rowIndex < self.tbl.rows.length - 1 ) {
self.swapTr(tr,self.tbl.rows[tr.rowIndex + 1 ]);
self.getChkBox(tr).checked = true ;
}
}
var arr = $A(self.tbl.rows)

if (arr.length > 0 && self.getChkBox(arr[arr.length - 1 ]).checked) {
for ( var i = arr.length - 1 ;i >= 0 ;i -- ) {
if (self.getChkBox(arr[i]).checked) {
arr.pop()
} else {
break
}
}
}
arr.reverse().each( function (tr) { if (self.getChkBox(tr).checked)downOne(tr)} );
} ,
sort: function () { // 排序
var self = this ,order = arguments[ 0 ];
var sortBy = function (a,b) {
if ( typeof (order) == " number " ) { // 数字,则按数字指示的列排序
return Number(a.cells[order].innerHTML) >= Number(b.cells[order].innerHTML) ? 1 : - 1 ; // 转化为数字类型比较大小
} else if ( typeof (order) == " function " ) { // 为程序,按程序的返回结果排序
return order(a,b);
} else {
return 1 ;
}
}
$A(self.tbl.rows).sort(sortBy).each( function (x) {
var checkStatus = self.getChkBox(x).checked;
self.tbl.firstChild.appendChild(x);
if (checkStatus)self.getChkBox(x).checked = checkStatus;
} );
} ,
rnd: function () b

表格操作类(添加，删除，排序，上移，下移)