怎样令数字从大到小排列起来?
一个页面里有五个竖排的表格,每个格用 <iframe> 调用别一页面的数字,数字大小随机,
有没有办法令这五个表格按大小,从上到下排列起来?
[解决办法]
<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()*9)
td3.innerHTML=Math.ceil(Math.random()*9)
},
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(){ //随即选择几行tr
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tr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){
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 onClick= "javascript:mytable.rnd() "> 随机选择行 </button>
<button onClick= "javascript:mytable.add() "> 添加一行 </button>
<button onClick= "javascript:mytable.del() "> 删除选定行 </button>
<button onClick= "javascript:mytable.up() "> 上移选定行 </button>
<button onClick= "javascript:mytable.down() "> 下移选定行 </button>
<button onClick= "javascript:mytable.sort(1) "> 按第一列数字排序 </button>
<button onClick= "javascript:mytable.sort(f) "> 按每行数据的和排序 </button>
<br/> <br/>
<table width=100%>
<tr>
<td valign= "top "> <table border id= "tbl " width= "80% "> </table> </td>
<td valign= "top "> <table border id= "tbl2 " width= "80% "> </table> </td>
</tr>
</table>
<br/> <br/>
<button onClick= "javascript:mytable2.rnd() "> 随机选择行 </button>
<button onClick= "javascript:mytable2.add() "> 添加一行 </button>
<button onClick= "javascript:mytable2.del() "> 删除选定行 </button>
<button onClick= "javascript:mytable2.up() "> 上移选定行 </button>
<button onClick= "javascript:mytable2.down() "> 下移选定行 </button>
<button onClick= "javascript:mytable2.sort(2) "> 按第二列数字排序 </button>
<button onClick= "javascript:mytable2.sort(f) "> 按每行数据的和排序 </button>
</body>
</html>
