js给数目字用豆号分节

js给数字用豆号分节

自己写的js给数字豆号分节,来提高自己

转自：http://www.ok22.org/art_detail.aspx?id=56 （可直接运行）

Html代码运行

< html >
< body >
< table border = "1" cellspacing = "5" id = "sp" >
< tr > < td > 12345436267.89 </ td > < td > 3402.89 </ td > < td > 3402 </ td > </ tr > </ table >
< script >
function formatNumber(num){
if(!/^(\+|-)?(\d+)(\.\d+)?$/.test(num)){return num;}
var a = RegExp .$1, b = RegExp .$2, c = RegExp .$3;
var re = new RegExp().compile("(\\d)(\\d{3})(,|$)");
while(re.test(b)) b b = b.replace(re,"$1,$2$3");
return a +""+ b +""+ c;
}
function spl(){
var tdvalue = document .getElementById("sp").getElementsByTagName("td");
var std = "" ;
var rstr = "" ;
for(j = 0 ;j < tdvalue.length ;j++)
{ std = "" ;
std = tdvalue [j];
rstr = formatNumber (std.innerHTML);
std.innerHTML = rstr
}
}
spl();
</ script >
</ body >
</ html >