转换千位分隔写了一个，楼主试下。针对的正整数，小数或者负数还得提前处理下。
关于点击切换选项显示不同的数据，可以onchange事件来从后台去相应的值赋值
<script> var test = "1232356788800001"; var i = test.length%3 > 0 ? Math.floor((test.length/3)) : (test.length/3)-1; var a = test.split(""); for (var x = 1; x<i+1; x++) { a.splice(-3*x-x+1, 0, ","); }; alert(a.join("")); </script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style></style><script language="javascript">window.onload=function(){ var oText=document.getElementById('text'); oText.onkeyup=function() { this.value=commafy(this.value); } }function commafy(value){ var tmp=value.replace(/[,]/g,'').split('').reverse().join(''); alert(tmp); tmp=tmp.replace(/(\d{3})(?=\d)/g,'$1,'); return tmp.split('').reverse().join(''); }</script></head><body><input type="text" id="text" /> </body></html>
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