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function sort(el, status)
{
var col_sort = el.innerHTML;
var tr = el.parentNode;
var table = tr.parentNode;
var td, col_sort_num;
for (var i=0; (td = tr.getElementsByTagName('th').item(i)); i++)
{
if(td.innerHTML == col_sort)
{
col_sort_num = i;
if(td.prevsort == 'y') {
el.up = Number(!el.up);
}
else if(td.prevsort == 'n') {
td.prevsort = 'y';
el.up = 0;
}
else
{
if(col_sort_num==0)
{ // already sorted
td.prevsort = 'n';
el.up = 1;
}
else if(col_sort_num==2)
{ // delta
td.prevsort = 'n';
el.up = 1;
}
else
{
td.prevsort = 'y';
el.up = 0;
}
}
}
else
{
if(td.prevsort == 'y') {
td.prevsort = 'n';
}
}
}
var a = new Array();
for(var i=1; i < table.rows.length; i++)
{
var cols = table.rows[i].getElementsByTagName('td');
if(cols.item(status)==null)
{ // double status
a[i-2][2] = table.rows[i];
}
else
{
a[i-1] = new Array();
var indent = cols.item(col_sort_num).innerHTML;
if(indent=='') indent='0';
if(indent.substr(indent.length-1, 1)=="%")
{ // delta
indent = indent.substr(0, indent.length-1)*100;
}
a[i-1][0] = indent;
a[i-1][1] = table.rows[i];
a[i-1][2] = null;
}
}
// sort table
a.sort(sort_array);
if(el.up) a.reverse();
// draw table
for(var i in a)
{
table.appendChild(a[i][1]);
if(a[i][2]!=null) {
table.appendChild(a[i][2]);
}
}
}
function sort_array(a,b)
{
if(a[0] == b[0]) return 0;
if(a[0] > b[0]) return 1;
return -1;
}