<script type="text/javascript">
var b = true ;
function sortAge(){
var tabNode = document.getElementsByTagName("table")[0];
var trNodes = tabNode.rows; //Gets the row object in the table
var arr = new Array();
for(var x=1;x<trNodes.length;x++){ //The temporary container stores references to the row objects in the table
arr[x-1] = trNodes[x];
}
sort(arr);
var tbdNode = tabNode.childNodes[0];
if(b){ //The if... The else... Controls are sorted by age
for(var x=0;x<arr.length;x++){
tbdNode.appendChild(arr[x]);
}
b = false;
}else{
for(var x=arr.length-1;x>=0;x--){
tbdNode.appendChild(arr[x]);
}
b = true ;
}
}
function sort(arr){ // The sorting
for(var x=0;x<arr.length;x++){
for(var y=x+1;y<arr.length;y++){
if(parseInt(arr[x].cells[1].innerText)>parseInt(arr[y].cells[1].innerText)){ //No parseInt conversion is performed by comparing strings to ASCII
var temp = arr[x];
arr[x] = arr[y];
arr[y] = temp;
}
}
}
}
</script>
<style type="text/css">
table{ width:60%; border:solid 1px #0066FF;}
table td {border:solid 1px #0099ff;}
a{ text-decoration: none;}
</style>
</head>
<body>
<table>
<tr>
<td> The name </td><td><a href="javascript:void(0)" onclick="sortAge()"> age </a></td><td> address </td>
</tr>
<tr>
<td> Zhang SAN </td><td>23</td><td> Beijing </td>
</tr>
<tr>
<td> Li si </td><td>25</td><td> Shanghai </td>
</tr>
<tr>
<td> Cathy </td><td>15</td><td> Guangzhou </td>
</tr>
<tr>
<td> Tang always </td><td>20</td><td> changsha </td>
</tr>
</table>
</body>