<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>js操作表格操方法,增加,修改,删除，一行记录</title>
<script type="text/javascript">
var mytable = null;
window.onload = function () {
mytable = new CTable("tbl", 10); //随机创建10行表格
}
Array.prototype.each = function (f) { //数组的遍历
for (var i = 0; i < this.length; i++) f(this[i], i, this)
}
function $A(arrayLike) { //数值的填充
for (var i = 0, ret = []; i < arrayLike.length; i++) ret.push(arrayLike[i]);
return ret
}
Function.prototype.bind = function () { //数据的绑定
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) //为表格添加行数
}
CTable.prototype = {
addrows: function (n) { //随机添加n行
new Array(n).each(this.add.bind(this))
},
add: function () { //添加1行
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) //第一列添加复选框
td1.setAttribute("width", "35")
td2.innerHTML = Math.ceil(Math.random() * 99) //第二列的随机填充值
td3.innerHTML = Math.ceil(Math.random() * 99) //第三列的随机填充值
},
del: function () { //删除所选行
var self = this
$A(self.tbl.rows).each(function (tr) { if (self.getChkBox(tr).checked) tr.parentNode.removeChild(tr) })
},
up: function () { //上移所选行
var self = this
var upOne = function (tr) { //上移1行
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() //反选
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 () { //下移所选行
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") { //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 () { //随即选择几行数据
var self = this, selmax = 0, tbl = self.tbl;
if (tbl.rows.length) {
selmax = Math.max(Math.ceil(tbl.rows.length / 4), 1); //选择的行数不超过tr数的1/4
$A(tbl.rows).each(function (x) {
self.getChkBox(x).checked = false;
self.restoreBgColor(x)
})
} else {
return alert("无数据可以选")
}
new Array(selmax).each(function () {
var tr = tbl.rows[Math.floor(Math.random() * tbl.rows.length)]
self.getChkBox(tr).checked = true;
self.highlight({ target: self.getChkBox(tr) })
})
},
highlight: function () { //设置行的背景色
var self = this;
var evt = arguments[0] || window.event
var chkbox = evt.srcElement || evt.target
var tr = chkbox.parentNode.parentNode
chkbox.checked ? self.setBgColor(tr) : self.restoreBgColor(tr)
},
swapTr: function (tr1, tr2) { //交换tr1和tr2的位置
var target = (tr1.rowIndex < tr2.rowIndex) ? tr2.nextSibling : tr2;
var tBody = tr1.parentNode
tBody.replaceChild(tr2, tr1);
tBody.insertBefore(tr1, target);
},
getChkBox: function (tr) { //从tr得到 checkbox对象
return tr.cells[0].firstChild
},
restoreBgColor: function (tr) {
tr.style.backgroundColor = "#ffffff"
},
setBgColor: function (tr) { //设置背景色
tr.style.backgroundColor = "#c0c0c0"
}
}
function f(a, b) {
var sumRow = function (row) { return Number(row.cells[1].innerHTML) + Number(row.cells[2].innerHTML) };
return sumRow(a) > sumRow(b) ? 1 : -1;
}
</script>
</head>
<body>
<button οnclick="javascript:mytable.rnd()">
随机选择行</button>
<button οnclick="javascript:mytable.add()">
添加一行</button>
<button οnclick="javascript:mytable.del()">
删除选定行</button>
<button οnclick="javascript:mytable.up()">
上移选定行</button>
<button οnclick="javascript:mytable.down()">
下移选定行</button>
<button οnclick="javascript:mytable.sort(1)">
按第一列排序</button>
<button οnclick="javascript:mytable.sort(f)">
按数据和排序</button>
<br />
<br />
<table width="100%">
<tr>
<td valign="top">
<table border id="tbl" width="80%">
</table>
</td>
</tr>
</table>
</body>
</html>
