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下面是一个格式化函数,可以控制小数位数,自动四舍五入。例如:12345格式化为12,345.00,12345.6格式化为12,345.60,12345.67格式化为 12,345.67,只留两位小数 <script type= "text/javascript" > function
fmoney(s, n) { n = n > 0 && n <= 20 ? n : 2; s = parseFloat((s + "" ).replace(/[^\d\.-]/g, "" )).toFixed(n) + "" ; var
l = s.split( "." )[0].split( "" ).reverse(), r = s.split( "." )[1]; t = "" ; for (i = 0; i < l.length; i ++ ) { t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? ","
: "" ); } return
t.split( "" ).reverse().join( "" ) + "."
+ r; } function
rmoney(s) { return
parseFloat(s.replace(/[^\d\.-]/g, "" )); } function
g(id) { return
document.getElementById(id); } window.onload = function () { var
num, txt = g( "txt" ), txt2 = g( "txt2" ), btn = g( "btn" ), btn2 = g( "btn2" ), span = g( "span" ); btn.onclick = function () { num = parseInt(g( "num" ).value); txt.value = fmoney(txt.value, num); txt2.value = fmoney(txt2.value, num); } ; btn2.onclick = function () { num = parseInt(g( "num" ).value); span.innerHTML = "="
+ fmoney(rmoney(txt.value) + rmoney(txt2.value), num); } ; } ; </script> 调用fmoney( "12345.675910" , 3),返回12,345.676。 |
原文地址:http://www.cnblogs.com/flying-tx/p/3699819.html