<SCRIPT LANGUAGE="JavaScript">
<!--
function checknumber(data){
var tmp ;
if (data == "") return true;
var re = /^[\-\+]?([0-9]\d*|0|[1-9]\d{0,2}(,\d{3})*)(\.\d+)?$/;
return re.test(data);
}
alert(checknumber("123,456.50"))
alert(checknumber("d123,456.50"))
//-->
</SCRIPT>
//格式-1,000,000.00
function checknumber(data){
var tmp ;
if (data == "") return true;
var re = /^[\-\+]?([0-9]\d*|0|[1-9]\d{0,2}(,\d{3})*)(\.\d+)?$/;
return re.test(data);
}