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><metahttp-equiv="Content-Type"content="text/html;charset=gb2312">
<styletype="text/css">*{font-size:14px}button{margin:3px}</style>
<scripttype="text/javascript">
varmytable=null,mytable2=null;window.onload=function(){mytable=newCTable("tbl",10);mytable2=newCTable("tbl2",6);
}Array.prototype.each=function(f){for(vari=0;i<this.length;i++)f(this[i],i,this)}function$A(arrayLike){for(vari=0,ret=[];i<arrayLike.length;i++)ret.push(arrayLike[i]);returnret}Function.prototype.bind=function(){var__method=this,args=$A(arguments),object=args.shift();returnfunction(){return__method.apply(object,args.concat($A(arguments)));}}functionCTable(id,rows){this.tbl=typeof(id)=="string"?document.getElementById(id):id;if(rows&&/^\d+$/.test(rows))this.addrows(rows)}CTable.prototype={addrows:function(n){//随机添加n个trnewArray(n).each(this.add.bind(this))},add:function(){//添加1个trvarself=this;vartr=self.tbl.insertRow(-1),td1=tr.insertCell(-1),td2=tr.insertCell(-1),td3=tr.insertCell(-1);varchkbox=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trvarself=this$A(self.tbl.rows).each(function(tr){if(self.getChkBox(tr).checked)tr.parentNode.removeChild(tr)})},up:function(){//上移所选trvarself=thisvarupOne=function(tr){//上移1个trif(tr.rowIndex>0){self.swapTr(tr,self.tbl.rows[tr.rowIndex-1])self.getChkBox(tr).checked=true}}vararr=$A(self.tbl.rows).reverse()if(arr.length>0&&self.getChkBox(arr[arr.length-1]).checked){for(vari=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(){varself=thisvardownOne=function(tr){if(tr.rowIndex<self.tbl.rows.length-1){self.swapTr(tr,self.tbl.rows[tr.rowIndex+1]);self.getChkBox(tr).checked=true;}}vararr=$A(self.tbl.rows)if(arr.length>0&&self.getChkBox(arr[arr.length-1]).checked){for(vari=arr.length-1;i>=0;i--){if(self.getChkBox(arr[i]).checked){arr.pop()}else{break}}}arr.reverse().each(function(tr){if(self.getChkBox(tr).checked)downOne(tr)});},sort:function(){//排序varself=this,order=arguments[0];varsortBy=function(a,b){if(typeof(order)=="number"){//数字,则按数字指示的列排序returnNumber(a.cells[order].innerHTML)>=Number(b.cells[order].innerHTML)?1:-1;//转化为数字类型比较大小}elseif(typeof(order)=="function"){//为程序,按程序的返回结果排序returnorder(a,b);}else{return1;}}$A(self.tbl.rows).sort(sortBy).each(function(x){varcheckStatus=self.getChkBox(x).checked;self.tbl.firstChild.appendChild(x);if(checkStatus)self.getChkBox(x).checked=checkStatus;});},rnd:function()b
