How can UP/DOWN scroll be distinguished??

he easiest way for me to tell was...

var tempScrollTop, currentScrollTop = 0;

$("#div").scroll(function(){

currentScrollTop = $("#div").scrollTop();

if (tempScrollTop < currentScrollTop )
//scrolling down
else if (tempScrollTop > currentScrollTop )
//scrolling up

tempScrollTop = currentScrollTop;
}

This works with mousewheel, up/down arrows, and slidebar

讓數字有逗點分隔

function addCommas(nStr)
{
 nStr += '';
 x = nStr.split('.');
 x1 = x[0];
 x2 = x.length > 1 ? '.' + x[1] : '';
 var rgx = /(\d+)(\d{3})/;
 while (rgx.test(x1)) {
  x1 = x1.replace(rgx, '$1' + ',' + '$2');
 }
 return x1 + x2;
}