$.format(1233443322, 3, ',')

 

js代码：

;(function($) {

$.extend({

format : function(str, step, splitor) {

if(str==null){

str='';

}

str = str.toString();

var len = str.length;

if(len > step) {

var l1 = len%step,

l2 = parseInt(len/step),

arr = [],

first = str.substr(0, l1);

if(first != '') {

arr.push(first);

};

for(var i=0; i<l2 ; i++) {

arr.push(str.substr(l1 + i*step, step));

};

str = arr.join(splitor);

};

return str;

}

});

})(jQuery);